DEF

DEF is one of the stats in Honkai: Star Rail, used by both characters and enemies. It is a stat that decreases DMG taken. Some character skills will also deal DMG or create shields based on DEF.
It multiplies incoming DMG by the following:
\text{DEF Multiplier} = 1 - (\frac{\text{DEF}}{\text{DEF} + 200 + 10 \times \text{Level}_\text{Attacker}})
==Character DEF==
Characters' Base DEF is determined by their level and their equipped Light Cone's level, while percentage and additive DEF bonuses can be obtained from Relics, Light Cone abilities, character skills, etc.
\text{Base DEF} = (\text{DEF}_\text{Character} + \text{DEF}_\text{Light Cone})
\text{Total DEF} = \text{Base DEF} \times (1 + \% \text{DEF Bonus} - \% \text{DEF Reduction}) + \text{Additive DEF Bonus}
==Enemy DEF==
Enemies' Base DEF is determined by their level:
\text{Base DEF}_\text{Enemy} = 200 + 10 \times \text{Level}
Therefore:
\text{DEF Multiplier}_\text{Enemy} = \frac{\text{Level}_\text{Attacker} + 20}{(\text{Level}_\text{Enemy} + 20) \times (1 + \% \text{DEF Bonus} - \% \text{DEF Reduction} - \% \text{DEF Ignore}) + \text{Level}_\text{Attacker} + 20}
The only exceptions to this are Trotters (e.g. Warp Trotter, Sequence Trotter, Trotter of Destruction), where:
\text{Base DEF}_\text{Trotter} = 300 + 15 \times \text{Level}
==Abilities==
==Bonus Abilities==
==Eidolons==
==Relic Sets==
==Light Cones==
==Enemies==
==Consumables==
==Other Languages==
==Change History==
==Navigation==
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