Ryoukan Hasumi

Ryoukan Hasumi (蓮見 了寛 Hasumi Ryoukan) is a renowned folklorist who attended college with Kantarou Ichinomiya. He stubbornly denies the existence of youkai, leading to frequent arguments with Kantarou on the topic. On a trip to England, he adopted Rosalie Hasumi as his daughter and brought her back to Japan.