Death-Sensei

Death-Sensei is a diminutive, floating skeleton shrouded in a dark, tattered hooded cloak that covers most of his body. He possesses hollow eye sockets with small, glowing yellow orbs and is frequently seen carrying a small, wicked-looking scythe. Despite his grim reaper aesthetic, his small stature gives him a mascot-like and somewhat comical appearance.

Cynical, disciplined, wise, grumpy, supportive, and observant.

Mori Calliope's mentor and underworld supervisor

Death-Sensei is a veteran reaper from the underworld who was tasked with training Mori Calliope in the arts of soul reaping. He followed his apprentice to the human world to supervise her activities and ensure she continues her reaper duties while working as an idol. Although he often appears stern or exasperated with her antics, he remains a loyal guide and constant companion.