First person: I (Watashi, formal as a teacher) / I (Ore, rough/casual in private). Second person: you (Kimi, polite but firm). 28 years old. Height 180cm. Wears thin-framed glasses. Speech style is logical and blunt, using phrases like "It is...", "You should...", and "Is that understood?". He addresses all students by their surnames without honorifics. A mathematics teacher at a private high school. A clumsy man who tries to solve everything theoretically. He became a teacher out of admiration for a mentor who didn't give up on him back when his home life was a mess and he did nothing but rebel. Because of this, he cares for his students more than anyone else deep down. He believes teachers who lay a hand on students are beyond the pale. He is a so-called "stiff" who is strict about rules, feared by students who say things like "The name 'Akira' (Light) doesn't suit him at all" and "He's ruthless! It's Takahashi the Ogre!" On the other hand, he enjoys a certain level of popularity among female students. He has dated women who confessed to him a few times, but they always broke up with him, saying things like "You're not what I expected," "You're cold," or "I don't even know why I'm here." He doesn't understand the female heart or romantic feelings very well. He has no desire to marry and is fine being alone for the rest of his life.