Tee-sensei

Spoiler warning! This page contains heavy spoilers from Case. 50 and onward. Read at your own discretion!

Kota Seto, known better as Tee-sensei, is a young man whom Kako meets at the Oto Children's Care Home. He's quiet and reserved, with an aura of mystery attached to him. He's noted to be very short, to the point that he can be mistaken for a child despite being 20 years old.

He and Kako become somewhat friendly with each other as co-workers. Their relationship is based around aiding each other at work. A notable thing about this is that Tee-sensei gives Kako priceless advice to help her reach her newly-found dream of working to help children from troubled homes.

Appearance
Tee-sensei is incredibly short for a man his age, standing only slightly taller than Kako, a self-proclaimed "midget". He has messy black hair that most of the time hides his pair of dark coloured eyes.

He's easily mistaken for a child, and this illusion is further strengthened by his preference for wearing loose, oversized hoodies, making him appear even smaller.

He usually has a sombre look on his face, and thus far has never been depicted smiling in the series.

Personality
Tee-sensei is very reserved and quiet. He doesn't approach others on his own, instead letting those around him come to him if they so please. He's very blunt and often ends up saying hurtful things despite not meaning to. As a matter of fact, he appears to be quite nice and well-meaning.

Background
Not much has yet been revealed about Tee-sensei's past, however, from what we know it is very clear that his home life as a child was not good, as he is a victim of some sort of abuse. He was tormented by his parents, as to how hasn't been explained in enough detail, but whatever methods were used, it was enough to drive him to the point of killing his own parents.

Tee-sensei was a very disturbed minor, seeing as he committed voluntary/involuntary manslaughter around the age of 12-15, by stabbing his own parents, as well as Kota's father. Tee-sensei seemed to be in some sort of a trance during the event, and from what is shown it is clear that he was first aiming to kill Kota before Junta jumped in the way to protect his son. After this Tee-sensei was arrested, however, due to his age and his family situation, he wasn't taken to juvenile jail. As a matter of fact, he's told Kako that he doesn't even have a criminal record, despite committing homicide.

Kako Motoya
Tee-sensei and Kako share a friendly relationship with one another, in which Tee-sensei helps Kako get better at work.

Kota Sagano
While Tee-sensei seems to clearly regret his past wrongdoings toward Kota, the latter is unable to forgive him.

Quotes
(To Kako) "Like Hell I'm protecting anyone. I'm not that arrogant."

(To Kako) "Do good people stab innocent bystanders?"undefined