
Quick answer — Youko Itou worked on ARIA The BENEDIZIONE (Character Design), ARIA The CREPUSCOLO (Character Design), Tamon's B-Side (Character Design) and 7 more anime.
Youko Itou worked on ARIA The BENEDIZIONE (Character Design), ARIA The CREPUSCOLO (Character Design), Tamon's B-Side (Character Design), Sing a Bit of Harmony (Prop Design), Amanchu! (Character Design), Amanchu! ~Advance~ (Character Design), LOVE STAGE!!: Chotto ja Nakutte (Chief Animation Director), Delico's Nursery (Character Design) and 2 more.