URWarriorLight

Katya

October 8, 2026 · 5 min read

UR Light Warrior: 1.08s Gatling plus Viper DEF shred for physical Warrior marches. 23,214 attack at Lv.150/5★.

Viper stacks 5% DEF down per hit, cap 25%, for 9s.
1.08s auto, so she is not empty on the 10s Viper cycle.
Light Warrior who still sits 8th in UR attack at 23,214.

katya
ur
warrior
light
gatling gun
viper
war machine
doomsday judgment

Skills

Skill 1

Gatling Gun

Auto AttackCD: 1.08sLv.1 required

0★: Attack enemies with a machine gun, dealing damage equal to 84.1% ATK.

5★: Attack enemies with a machine gun, dealing damage equal to 311.17% ATK.

The 1.08s auto is the damage between Vipers. 84.1% ATK at 0★, 311.17% at 5★. Star it so the gun keeps up. It does not buff allies.

Star upgrades
1★	Deals 35% more damage.
2★	Bonus damage is increased to 75%.
3★	Bonus damage is increased to 130%.
4★	Bonus damage is increased to 190%.
5★	Bonus damage is increased to 265%.

Skill 2

Viper

Active SkillCD: 10sLv.5 required

0★: Fires neurotoxin rounds at random enemies 10 times, dealing damage equal to 96.5% ATK and reducing their DEF by 5% (up to 25%) per hit for 9s.

5★: Fires neurotoxin rounds at random enemies 20 times, dealing damage equal to 194.7% ATK and reducing their DEF by 5% (up to 25%) per hit for 9s.

This is the kit. Random hits plus a stacking DEF cut, 5% per hit up to 25% for 9s, on a 10s cooldown. Hits 10 times at 0★, 15 at 2★, 20 at 4★. Physical Warriors get more from the shred than from her own 23,214 attack.

Star upgrades
1★	Deals 35% more damage.
2★	Increases the number of attacks to 15.
3★	Bonus damage is increased to 70%.
4★	Increases the number of attacks to 20.
5★	Bonus damage is increased to 120%.

Skill 3

War Machine

Passive SkillLv.21 required

0★: In combat, increases Physical DMG by 15.2%.

5★: In combat, increases Physical DMG by 30.2%.

Personal Physical DMG, 15.2% at 0★ to 30.2% at 5★. Feeds Gatling and Viper. It does not buff the row.

Star upgrades
1★	Increases Physical DMG by 3%.
2★	Increases bonus effect to 6%.
3★	Increases bonus effect to 9%.
4★	Increases bonus effect to 12%.
5★	Increases bonus effect to 15%.

Skill 4

Doomsday Judgment

Ace SkillLv.31 required

0★: Increases ATK, DEF, and HP by 20%. Increases Skill Cooldown Speed by 20%.

5★: Increases ATK, DEF, and HP by 20%. Increases Skill Cooldown Speed by 20%.

Personal capstone. Unlocks at level 31 and 4★. The printed line does not change from 0★ to 5★. Unlock it for 20% ATK, DEF, and HP plus 20% skill cooldown speed.

Overview

Katya is the UR Light Warrior who cuts DEF while she shoots. Gatling Gun is a 1.08s auto. Viper fires neurotoxin rounds at random enemies 10 times at 0★ and 20 times at 5★, each hit 5% DEF down (up to 25%) for 9s. War Machine raises Physical DMG. Doomsday Judgment unlocks at level 31 and 4★: 20% ATK, DEF, and HP, plus 20% skill cooldown speed.

At Lv.150 / 5★ she has 454,533 HP and 23,214 attack. Both sit 8th among the 15 URs. Power is 10th at 754,849. Summon: 10 fragments.

Best for / not for

Pick her in physical Warrior marches that can use the DEF shred. Light camp with Leah or Silas. Viper’s 25% DEF cap on a 10s skill is the reason she earns a slot over a pure attack column.

Skip her as a tank. 454,533 HP is less than half of Bekka (992,082). Skip her if you only need the highest UR attack: Lucian is 26,726, she is 23,214.

Team

Viper’s DEF cut is on enemies, not a row buff. Seat physical Warriors who spend that cut: Leah, Lucian, Nicole, Silas, Victor. Light seats next to her are Leah and Silas. She does not name a front or back row.

Investment

Skill books are the sum of the per-level costs in the game data. Use the hero calculator for EXP and fragments.

Skill	Books to Lv.30	Books to Lv.40
Gatling Gun	226,000	576,000
Viper	226,000	576,000
War Machine	226,000	576,000
Doomsday Judgment	226,000	576,000

Viper first: the DEF shred and the hit count. Gatling Gun second: the 1.08s auto has to keep up. War Machine third: 30.2% Physical DMG at 5★. Doomsday Judgment last, at level 31 and 4★.

Expert breakdown

Overall evaluation

Best skill priority

Upgrade in this order

1
Viper10 to 20 hits and the 25% DEF cap are the reason to own her.
2
Gatling Gun1.08s damage between Vipers.
3
War Machine30.2% Physical DMG at 5★ feeds both guns.
4
Doomsday Judgment20% stats and 20% cooldown speed at level 31 and 4★.

Strengths

Viper stacks 5% DEF down per hit, cap 25%, for 9s.
1.08s auto, so she is not empty on the 10s Viper cycle.
Light Warrior who still sits 8th in UR attack at 23,214.

Weaknesses

454,533 HP will not hold a front against Bekka, Dirk, or Arnold.
23,214 attack loses a burst check to Lucian (26,726), Yana (25,850), and Monroe (25,343).

Best role

PvPGoodGood. DEF shred plus a fast auto.
BossFairFair. Random hits can waste Viper on adds; the shred still lands.
ArenaGoodGood. Same as PvP.
CampaignGoodGood. Physical DMG and DEF cut both apply.
SupportSecondarySecondary. The shred is the ally value; she does not buff a row.

Verdict

Raise Katya when the march is physical Warrior and you want a DEF cut, not when you need a tank or the top UR attack column. Star Viper first so the hit count and the 25% cap exist, then the 1.08s Gatling. Take Doomsday Judgment at level 31 and 4★ for the 20% stats. Do not compare her HP to Bekka.