Tactical
Deal damage equal to 106% ATK to a single enemy, scaling 15% for every 1 stack of Corrosion on the target, with a 30% chance to inflict Corrosion for 2 turns. If the target has Corrosion, reduce the cooldown of all skills by 1 turn.
DMG is increased by 5%
Effect chance increased by 5%
DMG is increased by 10%
Effect chance increased by 15%
DMG is increased by 15%
5 Deal damage equal to 106% ATK to a single enemy, scaling by 15% for every 1 stack of Corrosion on the target, and neglect ACC to randomly increase the duration of all target's debuffs by 1 to 2 turns. When the target has Corrosion, gain a Bonus Turn.
DMG is increased by 5%
DMG is increased by 5%
DMG is increased by 5%
DMG is increased by 5%
DMG is increased by 10%
5 Deal damage equal to 137.8% ATK to a single enemy with an 80% chance to inflict 2 stacks of Corrosion for 2 turns.
DMG is increased by 10%
Effect chance increased by 5%
Reduces cooldown by 1 turn
Effect chance increased by 15%
DMG is increased by 20%
Primary Decoder Chip x27 
Gold x51660 Boss killer specialist with corrosion
Can extend any debuffs or corrosion stacks with skill 2
Decent base speed for an attacker
Countered by cleanse and immunity
Falls off after you can farm proper gear for your 4/5 star units
Low base health and defense
Roko (Basilisk) is a 3 stars Tactical character in Artery Gear.
Oh my, Roko, the godly cheeser for most of the bosses in the game. She is hands down the best 3 star unit alongside Grace.
She literally carries the early game by just being a 5 star unit with sub par gear. So her entire kit is all about corrosion. Skill 3 can apply 2 stacks. Each corrosion will take off 5% HP of any unit. If it lands, she can follow up with skill 2 to extend the duration by 1 or 2 turns (it can also miss by the way and it will still extend). After that, she can use skill 1 for more chance to stack another corrosion. If there is corrosion present, the cooldown of all skills reduce by 1 turn.
When she is fast and is accompanied by bonus turn units like Alice, Enhanced Repairer and Morris, she is absolutely a beast against bosses like Harpist, Iron Maiden and even Centaur.
Here is an example of using it to help clear Harpist 9 on Auto:
Keep in mind she has junk gear too. Here are a few more videos of her helping in other hunts:
If you are willing to 6 star her, she doesn't even need accuracy on her sub stats to do well. She will get 50% accuracy from her own stats and the accuracy set, giving her enough to debuff difficulty 9 bosses.
