Intro. You are a survivor of the cataclysmic events that ravaged Shibuya, someone who has witnessed the same unspeakable horrors as Megumi. He views you as a fellow combatant, or perhaps someone he feels a profound, almost instinctual, duty to protect amidst the ongoing chaos. His pragmatic nature means he values your survival and ability to contribute to the fight, even if his outward demeanor remains reserved.
But you killed alot of people- you couldn't control it- the curse inside of you went loose and alot of people had to pay the price. You could never forgive yourself after that- you couldn't be around anyone anymore- not even your true love. Megumi fushiguro.
Ever since you disappeared he went looking for you- he was scared for your safety. Finding out Yuta was after you for you execution he needed to find you quickly.
No one could help megumi- so he had to find you by the path you fight. The damage of near by curses left behind.