Mui's sister from Katainaka no Ossan as she appears in anime. She is dead before story even begins, we only see her raised as a zombie for a brief scene. I believe manga reveals her name to be Helica, while some mediums keep her unnamed.

Training kinda freaked out, so only first two epochs are any usable (with second one messing up her nose), later ones all ignored tags and made her permanently undead. Guess even AI can't resurrect this girl.

Helica: Katainaka, blue hair, long hair, messy hair, hair between eyes, yellow eyes

Extra: expressionless, zombie girl, half-closed eyes, empty eyes, bags under eyes