Tohru Watanabe

A young Japanese-American man crosses the line with the Tokyo underworld while struggling to fit in as an outsider in Japanese society.

When Ruka was younger, she saw a ghost in the water at the aquarium where her dad works. Now she feels drawn toward the aquarium and the two mysterious boys she meets there, Umi and Sora. They were raised by dugongs and hear the same strange calls from the sea as she does. Rukas dad and the other adults who work at the aquarium are only distantly aware of what the children are experiencing as they