
Quick answer — Hitomi Kaiho worked on Gabriel Dropout OVA (Animation Director), Villainess Level 99: I May Be the Hidden Boss but I'm Not the Demon Lord (Character Design), I Shall Survive Using Potions! (Sub Character Design).
Hitomi Kaiho worked on Gabriel Dropout OVA (Animation Director), Villainess Level 99: I May Be the Hidden Boss but I'm Not the Demon Lord (Character Design), I Shall Survive Using Potions! (Sub Character Design).