
Quick answer — Ayumu Kasuga worked on Castle Town Dandelion (Original Creator), Gonna be the Twin-Tail!! (Original Character Design), Undefeated Bahamut Chronicle (Original Character Design).
Ayumu Kasuga worked on Castle Town Dandelion (Original Creator), Gonna be the Twin-Tail!! (Original Character Design), Undefeated Bahamut Chronicle (Original Character Design).