Birthday: October 18
Height: 193 cm
Blood type: AB
Favorite subject: science
Interests: music
Favorite food: his mother's cooking
Disliked food: milk
Favorite phrase: "Is that so?"

A tall, bespectacled, fearsome-looking student with noticeable scar extending across his forehead and left eyebrow. When first introduced, he became a hikikomori a week after he got into trouble with a gang. Adachi and Shinigawa beat the gang (without knowing they themselves were the cause of his self-isolation) which allows him overcome his fears. When they forget about him, he is shattered again. Adachi tries to get him to attend school and take the exams, but he refuses, saying he is afraid of sitting next to Shinagawa. But Shinagawa realizes that Chiba is merely looking for Adachi's attention, and tells him to attend school and take the exams or she will never visit him again. Chiba is very smart and rich, and his mother is young and beautiful. He has a habit of unknowingly glaring at people which often cause a misunderstanding. He is very smart and almost always scores 100 marks for his tests, except for one occasion in chapter 67, where it is shown that he scored 94 marks on a math test, two marks lower than Shinagawa. In later latest chapters, it is shown that he has a crush on Makoto which seems obvious to everyone around him, however Makoto doesn't seem to have noticed yet.

(Source: Wikipedia)