Quick answer — Hiromi Mizutani worked on Hell Girl: Two Mirrors (Music), The Wallflower (Music), Hell Girl (Music) and 12 more anime.
Hiromi Mizutani worked on Hell Girl: Two Mirrors (Music), The Wallflower (Music), Hell Girl (Music), Hell Girl: Three Vessels (Music), Bottom-Tier Character Tomozaki (Music), Bottom-Tier Character Tomozaki 2nd Stage (Music), Sunday Without God (Music), Toriko (Music) and 7 more.