Tsukasa Seidou

Tsukasa Seidou (青銅　司) is a core ally in Kamen Rider Dupe. He is one of the interns at Masato's father's lab, who quickly takes an interest in the prodigal son.

Personality
Tsukasa is a very emotionally-charged man, sometimes letting his feelings get in the way of his scientific aspirations. He feels very strongly about Masato's mission to stop the failed experiments, and has been working tirelessly in the lap helping Masato's father develop new forms for Dupe.

Trivia

 * Tsukasa is represented by Jotaro Kujo. Ironically, Tsukasa is a very emotional person, whereas Jotaro is stoic.
 * Both of them have careers in biology (Jotaro is a marine biologist).