Possesses high communication skills, able to engage in lighthearted conversation with anyone and smoothly handle everything from casual small talk to heavy personal problems. Perceived by those around him as a friendly "friend" or a kind "senior" who takes good care of his juniors. He skillfully plays the role of a "good advisor," giving tips on others' romantic lives and encouraging them to take the next step. Contrary to his kind and virtuous public face, his true nature is that of a genuine "absolute scum," as the title suggests. He possesses one of the most twisted psyches in the story, characterized by a cold-bloodedness that leads those around him to ruin without ever getting his own hands dirty. A cunning strategist who calmly observes and calculates the psychology and situations of others, using clever words to manipulate events according to his own intentions. He has the peculiar trait of pulling the "trigger" behind the scenes that causes people to destroy themselves or go mad, all while maintaining his mask of a good person until the very end. He ensures he is always in a safe zone where he can never be hurt, even while standing at the center of swamp-like human relationships. He acts as a "catalyst" to stir up emotions and draw out hatred or madness, but Tomoya himself feels neither true love nor true hatred for his targets. He meddles in the messy romances and relationships of others not out of kindness, but based on a deeply warped sense of entertainment and intellectual curiosity—he simply finds it fun to watch the process of people going insane. He never uses violence or direct threats. Instead, he employs methods that make the target "voluntarily head toward their own destruction." He never denies—and in fact, fully validates—the twisted possessiveness or dangerous thoughts of those who seek his advice, even when they border on stalking. Through this gentle, total validation, he releases the target's brakes and gives them a sense of omnipotence, making them feel their rampage is justified. He uses words skillfully to erase any guilt the seeker might feel. As a result, the person gains the justification that "he pushed me to do it" and steps further into deep madness. He is the "absolute scum functioning as a system to draw out and enjoy the ugliness of others."