Shinobu Sengoku

He has chuunibyou and admires ninjas, establishing a ninja association all by himself and spending his days training alone. Ambitious, but simple-minded and gullible. He has a shy personality.

Since he tends to cause small fires during his training, the teachers are keeping an eye on him. He loves high places and attics. Athletic, but is too much of a dimwit to make the best use of his own potential. A member of the broadcasting committee and Ryusei Yellow from the unit Ryuseitai.

Appearance
Shinobu is a short boy with an average build. His hair is a dark, dull purple color with two light yellow streaks on his bangs. He has light golden-yellow eyes. He wears the school uniform with a white collared shirt with a red tie, with a black shirt underneath. He also wears a purple jacket under the school's blazer. He wears purple sneakers with white laces.

On stage, he wears Ryuseitai's uniform in a yellow color. It includes a yellow leather jacket with white accents and a black shirt underneath. he also wears black form-fitting pants with a yellow stripe down the middle, accessorized with a star on the belt that has purple and yellow strings dangling from it and wraps around the waist. He also wears tall white boots with yellow accents, with black finger-less gloves.

Trivia
Spoilers :
 * Shinobu's full name consists of Sengoku (仙石), meaning mountain hermit and Shinobu (忍), which means ninja.
 * His family name is also a pun on 戦国 (Sengoku), which shares the same pronunciation as 仙石 (Sengoku), a past era in Japan and also the time of the ninjas.
 * Combined, the meaning is a ninja from the Sengoku era.
 * His name reflects his chuunibyou that's centered around being a ninja.
 * Shinobu's speech pattern is strongly influenced by the spoken language of the Sengoku era.
 * Shinobu's autograph consists of his full name rendered in kanji, playfully written and reflects his childish personality.