Now she feels drawn toward the aquarium and the two mysterious boys she meets there, Umi and Sora.
The main cast includes, from left to right in the image below, Hiiro Ishibashi as Umi, Mana Ashida as Ruka Azumi, and Airu Kubodzuka as Sora.
When Ruka was younger, she saw a ghost in the water at the aquarium where her dad works.
The official website for Studio 4°C’s anime film of Daisuke Igarashi’s Children of the Sea (Kaijū no Kodomo) manga revealed more cast members and a new poster visual for the film on Wednesday.