Operator Module

Operator Modules, or simply Modules/Mods, are a feature for 4★ and above Operators in Arknights, introduced alongside class branches in Dossoles Holiday.

Overview

Operator Modules are a special item that acts as an "equipment" which improves the Operator's attributes and either upgrades their trait or adding a new trait when equipped, improving the Operator's performance particularly in their primary roles. All Modules are unique to each Operator and cannot be equipped by the others, even those in the same class, branch, or rarity.

Modules must be unlocked by using Module Data Block, upgrade materials, and LMD once the player completes two Module Missions and by raising the corresponding Operator's promotion and level to a specific threshold:

• 4★: Elite 2 Level 40
• 5★: Elite 2 Level 50
• 6★: Elite 2 Level 60

The first Module Mission requires the player to achieve a relatively straightforward goal and can be completed in all operations outside of Integrated Strategies, Paradox Simulation, and Reclamation Algorithm, while the second Module Mission must be completed in a specific Main Theme (on Standard Environment if the episode features it) or Intermezzi/Side Story operation in the Terminal. Both Module Missions also requires the player to use the Operator of their own; Support Units will not qualify for completing them.

Before the Module is unlocked, the Operator's respective Badge will be equipped in the Module slot as the default. Once a Module is unlocked, it will be automatically set as the default option.

Since the Lingering Echoes update, Modules can be upgraded through two additional stages to improve the corresponding Operator's talent or add a new talent, and enhance its attribute improvements at the cost of more Module Data Blocks, upgrade materials, and LMDs, as well as a large amount of Data Supplement Stick for the second stage and Data Supplement Instrument for the third stage.

Since the Adventure That Cannot Wait for the Sun (CN)/Path of Life (Global) update, unlocking the Module can be done even if the Operator has 0 Trust, while upgrading it to Stage 2 and 3 now requires the Operator to have at least 50% and 100% Trust, respectively.

Operator Modules fall into three distinct categories:

• X and Y Modules are the standard, with each type having a base effect upgrading the Operator's trait that is identical for every Operator with that type of Module (e.g. all Splash Casters with an SPC-Y Module will share the same effect), with their upgrades instead being enhancements for their individual talents. An Operator normally has either an X Module or Y Module, but 6★ Operators can have both an X and Y Module which upgrade different talents with certain exceptions.
• Δ (pronounced "Delta") Modules are a non-standard Module type that is identical to the X and Y Modules in terms of functionality, but tend to be more personalized and/or make more drastic changes to their abilities, most commonly the ability to inflict or interact with both Elemental Injury and Elemental damage. Currently Δ Modules are exclusive to 6★ Operators.
• Specialized Modules are completely personalized Modules that will only take effect in Integrated Strategies or Reclamation Algorithm, but in exchange, only require 1 Module Data Block to unlock and upgrade (for a total of 3). Their base effect modifies the operator's trait in a way that specifically benefits that Operator, and provide more drastic changes to the Operator's talents than even a Δ Module. Currently Specialized Modules are exclusive to 6★ Operators, and their designation refers to the mode they are exclusive to ("ISW" or "RA") followed by a letter of the Greek alphabet.

List

The following is a list of current class branches with available Modules including their effects and which Operators have them, sorted alphabetically by their branch name and introduction date.

CasterDefenderGuardMedicSniperSpecialistSupporterVanguard

Branch	Module	Description
Chain Caster	CHA-X	Reduces the damage loss in each jump to 10% and increases the Slow duration of each hit to 0.8 seconds (the same as Decel Binder Supporters). Introduced in: Near Light
	CHA-Y	Removes the damage loss in each jump. Introduced in: Near Light
Splash Caster	SPC-X	Extends the Splash Caster's attack range to 3×3 with a 1×1 extension up front. Introduced in: Guide Ahead
	SPC-Y	Reduces the Splash Caster's DP cost by 8. Introduced in: Guide Ahead
Mystic Caster	MSC-X	The Mystic Caster can store one additional attack. Introduced in: Lingering Echoes
	MSC-Y	When the Mystic Caster stores at least one attack, their ASPD is increased by 30. Introduced in: An Obscure Wanderer
	MSC-Δ	When the Mystic Caster deals Arts damage, the target will also be inflicted with Necrosis Damage equal to 8% of the damage dealt. Introduced in: Episode 13: The Whirlpool that is Passion
Core Caster	CCR-X	The Core Caster's attacks ignore 10 RES. Introduced in: Where Vernal Winds Will Never Blow
	CCR-Y	The Core Caster restores 1 SP when attacking elite or boss enemies. Introduced in: Where Vernal Winds Will Never Blow
	CCR-Δ	When the Core Caster deals Arts damage, the target will also be inflicted with Necrosis Damage equal to 8% of the damage dealt. Introduced in: Episode 14: Absolved Will Be the Seekers
Blast Caster	BLA-X	The Blast Caster's ATK is increased when attacking targets further away from their position, which caps at 10%. Introduced in: A Flurry to the Flame
	BLA-Δ	When the Blast Caster deals Arts damage, the target will also be inflicted with Burn Damage equal to 8% of the damage dealt. Introduced in: Path of Life
Phalanx Caster	PLX-X	The DEF and RES buff while the skill is not active is increased to 215% and 25, respectively. While the Phalanx Caster's skill is active, their DEF and RES are increased by 100% and 10, respectively. Introduced in: Episode 12: All Quiet Under the Thunder
	PLX-Y	The Phalanx Caster deals more damage the more enemies are within range, which caps at 15%. Introduced in: The Rides to Lake Silberneherze
Mech-Accord Caster	FUN-X	The Drone's initial damage is increased to 35% of the Mech-Accord Caster's ATK. Introduced in: The Rides to Lake Silberneherze
	FUN-Y	The Drone's damage cap is increased to 120% of the Mech-Accord Caster's ATK. Introduced in: The Rides to Lake Silberneherze

Branch	Module	Description
Duelist Defender	HES-X	The Duelist Defender's SP recovery/restoration rate is reduced by 80% while they are not blocking enemies. Introduced in: Stultifera Navis
	HES-Y	The Duelist Defender can now restore SP while not blocking enemies. While blocking enemies, the Duelist's ATK and DEF are increased by 15%. Introduced in: An Obscure Wanderer
Guardian Defender	GUA-X	When the Guardian Defender heals friendly units whose HP had fallen below 50%, the healing amount is increased by 15%. Introduced in: Lingering Echoes
	GUA-Y	The Guardian Defender takes 15% less damage. Introduced in: Lingering Echoes
Protector Defender	PRO-X	While the Protector Defender is blocking enemies, their DEF is increased by 20%. Introduced in: An Obscure Wanderer
	PRO-Y	The Protector Defender can block four enemies on their own. Introduced in: An Obscure Wanderer
Fortress Defender	FOR-X	The Fortress Defender has 110% ATK against blocked enemies. Introduced in: Episode 13: The Whirlpool that is Passion
	FOR-Y	Increases the Fortress Defender's ASPD by 10. Introduced in: Ending a Grand Overture
Juggernaut Defender	UNY-X	The Juggernaut Defender takes 15% less damage from enemies they are blocking. Introduced in: Zwillingstürme im Herbst
	UNY-Y	The Juggernaut Defender's ATK and DEF are increased by 8% if there are no friendly units in the surrounding 8 tiles. Introduced in: Path of Life
Sentry Protector Defender	SPT-X	Reveals invisible enemies within the Sentry Protector Defender's attack range. Introduced in: Operation Lucent Arrowhead

Branch	Module	Description
Instructor Guard	INS-X	The Instructor Guard's ATK against enemies they are not blocking is further increased to 130%. Introduced in: Dossoles Holiday
	INS-Y	The Instructor Guard can now be deployed on both low ground and high ground tiles. Introduced in: Dossoles Holiday
Swordmaster Guard	SWO-X	The Swordmaster Guard's skills deal 10% more damage. Introduced in: Break the Ice
	SWO-Y	The Swordmaster Guard's attacks ignore 70 DEF. Introduced in: Break the Ice
Dreadnought Guard	DRE-X	The Dreadnought Guard has 115% ATK against blocked enemies. Introduced in: Invitation to Wine
	DRE-Y	When the Dreadnought Guard's HP is reduced to 0, they will survive with full HP and ASPD increased by 30, but their maximum HP is reduced by 60%. This effect can only be triggered once per deployment. Introduced in: Invitation to Wine
Soloblade Guard	SBL-X	If the Soloblade Guard's HP is below 50%, they gain a 25% Sanctuary. Introduced in: What the Firelight Casts
	SBL-Y	When the Soloblade Guard's HP is reduced to 0, they will survive with 30% HP. This effect can only be triggered once per deployment. Introduced in: The Black Forest Wills A Dream
Reaper Guard	REA-X	The HP restoration per hit in each attack is increased to 60. Introduced in: [Global] Hortus de Escapismo, [CN] So Long, Adele
Centurion Guard	CEN-X	The Centurion Guard has 110% ATK against blocked enemies. Introduced in: So Long, Adele
	CEN-Y	If the Centurion Guard's HP is above 50%, the Physical damage they take is reduced by 20%. Introduced in: So Long, Adele
Fighter Guard	FGT-X	The Fighter Guard can dodge Physical attacks 15% of the time. Introduced in: Here A People Sows
	FGT-Y	If Fighter Guard's HP is above 50%, their ASPD is increased by 10. Introduced in: Here A People Sows
Lord Guard	LOR-X	The Lord Guard's attacks deal an additional instance of Arts damage equal to 10% of their ATK. Introduced in: Episode 14: Absolved Will Be the Seekers
	LOR-Y	If there are at least 2 enemies within the Lord Guard's attack range, their ASPD is increased by 12. Introduced in: Episode 14: Absolved Will Be the Seekers
	LOR-Δ	The Lord Guard's attacks inflict Nervous Impairment equal to 10% of damage dealt. Introduced in: [CN] The Masses' Travels
Crusher Guard	CRU-X	Amplifies healing received by the Crusher Guard by 20%. Introduced in: Delicious On Terra
Arts Fighter Guard	AFT-X	If the Arts Fighter Guard is not blocking an enemy, their ASPD is increased by 8. Introduced in: [CN] Exodus from the Pale Sea
	AFT-Y	Inflicts a 10% Arts Fragility to enemies being blocked by the Arts Fighter Guard. Introduced in: [CN] Exodus from the Pale Sea
	AFT-Δ	The Arts Fighter Guard deals an additional instance of Elemental damage equal to 15% ATK against enemies under the burst effect of Burn Damage. Introduced in: [CN] Exodus from the Pale Sea
Earthshaker Guard	HAM-X	If there are 3 or more enemies in the splash radius of the Earthshaker Guard's attack, increases the ATK of that attack to 115%. Introduced in: [CN] Such is the Joy of Our Reunion
Liberator Guard	LIB-X	When deployed, the Liberator Guard's trait effect will start at +100% ATK. Introduced in: [CN] The Masses' Travels

Branch	Module	Description
Multi-target Medic	RIN-X	The Multi-target Medic's range is extended to an adjusted 3×4 with a 1×1 extension up front. Introduced in: Episode 9: Stormwatch
	RIN-Y	The Multi-target Medic can now heal up to four friendly units at once. Introduced in: Episode 9: Stormwatch
Therapist Medic	WAH-X	The Therapist Medic has Status Resistance and -1 aggression level. Introduced in: Stultifera Navis
	WAH-Y	Removes the healing penalty on further targets. Introduced in: Stultifera Navis
Medic Medic	PHY-X	When the Medical Medic heals friendly units whose HP had fallen below 50%, the healing amount is increased by 15%. Introduced in: [Global] Il Siracusano, [CN] Episode 11 Warm-Up
	PHY-Y	When the Medical Medic heals friendly units on low ground tiles, the healing amount is increased by 15%. Introduced in: [Global] Il Siracusano, [CN] Episode 11 Warm-Up
Incantation Medic	INC-X	The healing amount on each attack is increased to 60%. Introduced in: The Rides to Lake Silberneherze
Wandering Medic	WDM-X	The Elemental Injury recovery of each healing is increased to 60%. Introduced in: Adventure That Cannot Wait for the Sun

Branch	Module	Description
Deadeye Sniper	DEA-X	The Deadeye Sniper's ATK is increased when attacking targets further away from their position, which caps at 15%. Introduced in: Episode 9: Stormwatch
	DEA-Y	The Deadeye Sniper restores 1 SP in each attack if it would not defeat/destroy the target. Introduced in: Episode 9: Stormwatch
Artilleryman Sniper	ART-X	The Artilleryman Sniper has 110% ATK against blocked enemies. Introduced in: Guide Ahead
	ART-Y	The Artilleryman Sniper's attacks ignore 100 DEF. Introduced in: Guide Ahead
Heavyshooter Sniper	ARC-X	Reduces the Heavyshooter Sniper's redeployment time by 25 seconds. Introduced in: Episode 10: Shatterpoint
	ARC-Y	The Heavyshooter Sniper has 105% ATK and ignores Physical dodge against targets right in front of them. Introduced in: Ideal City
Marksman Sniper	MAR-X	The Marksman Sniper has 110% ATK against aerial enemies. Introduced in: Dorothy's Vision
	MAR-Y	If there are ground enemies within the Marksman Sniper's attack range, their ASPD is increased by 8. Introduced in: Dorothy's Vision
Besieger Sniper	SIE-X	The Besieger Sniper has 115% ATK against enemies with a weight of 3 or higher. Introduced in: What the Firelight Casts
Flinger Sniper	BOM-X	The Flinger Sniper's attacks now release a second shockwave. Introduced in: Lone Trail
Hunter Sniper	HUN-X	When the Hunter Sniper's ammo is depleted, they will load one additional ammo in the next reload. Introduced in: Path of Life
Spreadshooter Sniper	RPR-X	The Spreadshooter Sniper's ATK against enemies in the frontal row is increased to 160%. Introduced in: A Kazdelian Rescue

Branch	Module	Description
Executor Specialist	EXE-X	When the Executor Specialist is retreated, 80% of their current DP cost is refunded. Introduced in: Near Light
	EXE-Y	If there are no friendly units in the adjacent 4 tiles to the Executor Specialist, their ATK is increased by 10%. Introduced in: Near Light
Merchant Specialist	MER-X	Reduces the DP drained by the Merchant Specialist while they are deployed to 2 DP every 3 seconds (also reduces the minimum DP threshold to automatically retreat the Merchant Specialist when there are insufficient DP to 1). Introduced in: Invitation to Wine
	MER-Y	The Merchant Specialist's ATK is increased by 4% whenever their trait drains DP, which stacks up to 5 times. Introduced in: The Rides to Lake Silberneherze
Dollkeeper Specialist	PUM-X	The Substitute has +15% ATK. Introduced in: Stultifera Navis
	PUM-Y	The Substitute has +15% HP. Introduced in: Stultifera Navis
Ambusher Specialist	AMB-X	Reduces the MSPD of enemies within the Ambusher Specialist's range by 20%. Introduced in: Ideal City
	AMB-Y	Increases the Ambusher Specialist's innate Physical/Arts dodge rate to 65%. Introduced in: What the Firelight Casts
Hookmaster Specialist	HOK-X	Enemies being dragged by the Hookmaster Specialist take Arts damage based on how far they are dragged (see Debuff#Distance-based damage for more information). Introduced in: Ideal City
	HOK-Y	When the Hookmaster Specialist drags an enemy from at least 2.5 tiles away, the shift level is increased by 1. Introduced in: Path of Life
Push Stroker Specialist	PUS-X	When the Push Stroker Specialist is deployed on high ground tiles, half of their base DP cost is refunded. Introduced in: A Flurry to the Flame
	PUS-Y	While the Push Stroker Specialist is blocking at least two enemies, the shift force they deliver is increased by 1. Introduced in: A Flurry to the Flame
Trapmaster Specialist	TRP-Y	There is a 20% chance that the trap deployed by the Trapmaster Specialist does double damage when triggered. Introduced in: Episode 12: All Quiet Under the Thunder
	TRP-Δ	The Trapmaster Specialist and their traps can now be deployed on both low and high ground tiles. Introduced in: Operation Lucent Arrowhead
Geek Specialist	GEE-X	If the Geek Specialist's HP is above 80%, their automatic SP recovery rate is increased by 0.25/second. Introduced in: Hortus de Escapismo
Alchemist Specialist	ALC-X	The Alchemist Specialist's SP recovery rate increases by +0.1/second when their Alchemical Unit is on the field. Introduced in: [CN] When Elegies Are Ashes

Branch	Module	Description
Summoner Supporter	SUM-X	The first deployed summon of the Summoner Supporter does not use up a Unit Limit. Introduced in: Dossoles Holiday
	SUM-Y	Increases the deployment count of the Summoner Supporter's summoned unit by 3 and reduces their DP cost (varies with the summon). Introduced in: Dossoles Holiday
Decel Binder Supporter	DEC-X	If an enemy is inside the Decel Binder Supporter's range, their automatic SP recovery rate is increased by 0.2/sec. Introduced in: Episode 10: Shatterpoint
	DEC-Y	Extends the Slow duration of the Decel Binder Supporter's attacks to 1.2 seconds. Introduced in: Episode 10: Shatterpoint
Hexer Supporter	UMD-X	The Hexer Supporter's attacks inflict a 10% Enfeeble for 2 seconds. Introduced in: Lone Trail
	UMD-Y	The Hexer Supporter's SP recovery rate increases by +0.25/second when Elite or Leader enemies are within their Attack Range. Introduced in: [CN] When Elegies Are Ashes
Artificer Supporter	CRA-X	Increases the deployment count of the Artificer Supporter's Support Devices by 1 and reduces their DP cost (varies with the Device) Introduced in: Hortus de Escapismo
	CRA-Y	Reduces the Support Device's redeployment time (varies with the Device) Introduced in: Ending a Grand Overture
Abjurer Supporter	BLS-X	The Abjurer Supporter now heals friendly units without penalty while their skill is active. Introduced in: Come Catastrophes or Wakes of Vultures
	BLS-Y	The Abjurer Supporter can now attack or heal 2 targets simultaneously. Introduced in: [CN] The Masses' Travels
Bard Supporter	BAR-X	If there are at least 2 other Operators in the Bard Supporter's range, their ATK is increased by 8% (cannot be influenced by skills). Introduced in: Ending a Grand Overture
Ritualist Supporter	RIT-X	The Ritualist Supporter deals 18% more Elemental Injury against elite and boss enemies. Introduced in: I Portatori dei Velluti

Branch	Module	Description
Charger Vanguard	CHG-X	Increases the DP generated when the Charger Vanguard defeats an enemy to 2. Instead of the base DP cost, their current DP cost will be refunded when the Charger is retreated. Introduced in: Break the Ice
	CHG-Y	The Charger Vanguard has 115% ATK against enemies with less than 40% HP. Introduced in: Break the Ice
Pioneer Vanguard	SOL-X	While the Pioneer Vanguard is blocking enemies, their ATK and DEF are increased by 8%. Introduced in: Il Siracusano
	SOL-Y	Reduces the Pioneer Vanguard's DP cost by 4 at their first deployment. Introduced in: Il Siracusano
Standard Bearer Vanguard	BEA-X	The Operator in front of the Standard Bearer Vanguard has their block count increased by 1 while their skill is active. Introduced in: The Black Forest Wills A Dream
	BEA-Y	The Standard Bearer Vanguard gains Camouflage while their skill is active. Introduced in: [CN] When Elegies Are Ashes
Tactician Vanguard	TAC-X	The Reinforcement takes 15% less damage from enemies it is blocking. Introduced in: Babel
	TAC-Y	Enemies blocked by the Reinforcement has increased aggression and increases the Tactician Vanguard's ATK against them to 165%. Introduced in: Babel
Agent Vanguard	AGE-X	The Agent Vanguard has -1 aggression level. Introduced in: Delicious On Terra
	AGE-Y	The Agent Vanguard's Redeployment Time for the first redeployment is reduced by 35%. Introduced in: [CN] Episode 15: Dissociative Recombination

Specialized

Integrated StrategiesReclamation Algorithm

Operator	Module	Description
	ISW-α	Kal'tsit can now heal up to two friendly units at once. Introduced in: Adventure That Cannot Wait for the Sun
	ISW-α	Each attack done by Phantom and his Phantom in the Mirror reduces their redeployment time in the next redeployment by 1 second (cannot be reduced below 0). Introduced in: Adventure That Cannot Wait for the Sun
	ISW-α	While Angelina is present, all enemies have their weight reduced by 1. Introduced in: I Portatori dei Velluti
	ISW-α	Rosmontis' attacks deal an additional instance of Arts damage equal to her ATK. Introduced in: I Portatori dei Velluti
	ISW-α	Dusk can attack two targets at once. Introduced in: [CN] Such is the Joy of Our Reunion
	ISW-α	Mizuki gains +50 ASPD and recovers 4% HP per second. Introduced in: [CN] The Masses' Travels
	ISW-α	Archetto gains +1 attack range for every Operator on the field with an Offensive Recovery skill (up to 3). Introduced in: [CN] The Masses' Travels

Operator	Module	Description
	RA-α	Can regenerate SP normally if under the effect of a Provision; attracts enemies within a radius of 5 to Eunectes' position when she uses a skill. Introduced in: [CN] Such is the Joy of Our Reunion

Trivia

• Most Operator Modules' designations are shorthand for the name of their class branch, with the exceptions of the following which are usually named after the branches' internal names:
  • Mech-Accord Casters' are designated "FUN" for Funnel, referencing the famous drone weapons from Mobile Suit Gundam.
  • Duelist Defenders' are designated "HES".
  • Juggernaut Defenders' are designated "UNY" for Unyielding.
  • Medical Medics' are designated "PHY" for Physician.
  • Multi-target Medics' are designated "RIN" for Ringhealer.
  • Therapist Medics' are designated "WAH", possibly for Wide Area Healer.
  • Heavyshooter Snipers' are designated "ARC".
  • Flinger Snipers' are designated "BOM" for Bombardier.
  • Spreadshooter Snipers' are designated "RPR" for Reaper Range. Interestingly, the Spreadshooter branch far predates Reaper Guards.
  • Dollkeeper Specialists' are designated "PUM", possibly for Puppet Master.
  • Hexer Supporters' are designated "UMD" for Underminer.
  • Artificer Supporters' are designated "CRA" for Craftsman.
  • Abjurer Supporters' are designated "BLS" for Blessing.
  • Pioneer Vanguards' are designated "SOL".
  • Earthshaker Guards' are designated "HAM" for Hammer.
• Before the name of the Soloblade Guard was changed from "Musha Guard" in the Here A People Sows update, their Modules were designated "MUS".