Jujutsu Kaisen Zero Description:

Yuuta Okkotsu is haunted. Ever since his childhood friend Rika died in a traffic accident, her ghost has stuck with him. But her spirit does not appear as the sweet girl Yuuta once knew. Instead, she manifests as a monstrous and powerful entity who fiercely protects him. Unable to control Rika’s violent behavior, Yuuta is helpless to stop the bloodshed that follows from her brutal vengeance. As a result, when apprehended by Jujutsu sorcerers–the secret guardians of the world, trained to combat forces like Rika–Yuuta wishes to be completely isolated so that no one else can get hurt.