Tenacity

“	Increases stats proportionally based on lost HP, reaching the maximum bonus once a certain percentage has been lost (only the strongest effect of this type applies).	”
	—In-game tip

Tenacity is a buff in Arknights, introduced alongside Episode 12; before this, it was a feature exclusive to Musha Guards.

Overview

Only Operators who have Tenacity, which increases their own attributes that scales on the Operator's missing HP; the lower their HP, the higher the attribute increase, which reaches the highest possible once the Operator's HP falls below a certain percentage of their maximum HP.

Multiple instances of Tenacity are mutually exclusive on a given attribute; the highest effect takes precedence over the others.

Sources

Operator	Source	HP threshold	Maximum value
	Nobukage-ryu - Hatobu	Base: 50% Elite 1: 40% Elite 2: 30%	Base: 50 ASPD Elite 1: 75 ASPD Elite 2: 100 ASPD
	Waxing Moon	Base/MUS-X Stage 3: 50% Elite 1/MUS-X Stage 2: 40% Elite 2: 30%	Base: 50 ASPD Elite 1: 75 ASPD Elite 2: 100 ASPD MUS-X Stage 2: 120 ASPD MUS-X Stage 3: 130 ASPD
	Hot-Blooded Vanguard	30%	Elite 1: 40% ATK Elite 2: 50% ATK DRE-X Stage 2: 55% ATK DRE-X Stage 3: 58% ATK Potential 5: +2% ATK
	Decisive	Base: 50% Elite 1: 40% Elite 2: 30%	Base: 30 ASPD and 30% DEF Elite 1: 40 ASPD and 40% DEF Elite 2: 50 ASPD and 50% DEF
	Serious Mode		Base: 50 ASPD Elite 1: 75 ASPD Elite 2: 100 ASPD