Matsuro Choukahashi

Matsuro Choukahashi is a 12 year old mathlete, one of Hazuki's classmates and one of the main characters of Supernatural.

Development
Almost all of Matsuro's character is based on a good friend of mine, including his idol, birthdate, favourite colour, role in family, and appearance. Even his name is based on my friend's name. The only thing I stretched a little is the mathlete bit, my friend is not really a mathlete, but still moderately good at math.

Matsuro Choukahashi's real name is Mashrif Chowdhury.

Honesty
Matsuro is straight and truthful and rarely lies about things. He often disapproves of fooling around with elders aand lying to them about things even for a joke. He refuses to lie even when he performs poorly in class, he tells his parents the truth.

Straightforwardness and simplicity
Matsuro is simple and meek-its easy to fool or trick him. He can't spot any sarcasm or slyness easily, making him very vulnerable to the bullying of Mayumi Matsumoto.

Math skills
Matsuro is a mathlete-a genius at maths, ,much to Warai's astonishment. In contrast to Warai who detests math heavily, Matsuro actually enjoys the subject.

Diligence
Matsuro is efficient in whatever he is doing, much like Kiriko. He works with care and focus in contrast to Hazuki whose mind often drifts away.

Family
Matsuro has twin younger siblings, Mari (sister) and Mirai (brother). They are five years old and look up to him. Mirai and Matsuro often playfully fight around.

Matsuro's mother is a housewife and his father is a scientist. He has a science lab full of chemicals in the house and Hazuki had an accident there causing her to gain super powers.