Quick answer — Rumiko Nagai worked on ONE PIECE FAN LETTER (Color Design), Mononoke (Color Design), World Trigger 3rd Season (Color Design) and 9 more anime.
Rumiko Nagai worked on ONE PIECE FAN LETTER (Color Design), Mononoke (Color Design), World Trigger 3rd Season (Color Design), Dragon Ball Super: Broly (Color Design), ONE PIECE HEROINES (Color Design Assistance), Dragon Ball Super: SUPER HERO (Color Design), Welcome to Irabu's Office (Color Design), Dragon Ball DAIMA (Color Design) and 4 more.
