Daruku Hoshino

星埜 ダルク

Tensai's assistant, where Daruku and the Tensai maintain a sort of Sherlock Holmes and John Watson kind of relationship. They transfer to Juugo's school where they are also the his classmate after their brief visitation at his apartment where they also met Nanana. They become members of the "Adventure Club".

(Source: AniLinkz)