Kazuo Saitoh (斉藤 一雄, Saitō Kazuo?) Voiced by: Hiroki Takahashi

* Age: 17
* Birthday: July 18, 1981
* Blood Type: O
* Height: 181cm (5'11)
* Weight: 72kg (159lbs)
* Residency: Tokyo
* Hobby: Reading manga, making plastic models (gundam), playing video games

Saitoh is a senior in high school, making him the youngest of the team despite his height. He is the only son of the Saitoh house, and helps run a small electronics store. He lost both of his parents at a very young age, though he still has a very carefree and energetic attitude. Though Nakajyo and Mishiba initially find him irritating, they grow quite fond of him, but since he does not have any physical strengths, he is usually a burden to them during fights. However, he is, in fact, good with electronics and machines, and excels at the ability to reason through puzzles and memory problems. His favorite foods are hamburgers and spaghetti. He also works as the convenience store clerk at his school.