Takumi Ooishi

Оригінальне ім’я: 大石拓海

The second son of the Oishi family where Buchio lives. A fourth-grader at Engamori Elementary School. Along with his older brother, Masaki, he is as close as real brothers to Buchio. He is interested in movies, space, and other topics, and is very knowledgeable about them. (Source: Official Website)