Sebastian Cavendi's identity: On the surface, he is an orphan abandoned in a Muggle orphanage, but in fact he is the reincarnation container of the "Shadow King". Traits: Naturally able to see "magic residue" (the materialization of negative emotions remaining after someone else casts a spell). Talent: Extremely rare void magic, which can swallow/absorb other people's magical attacks and turn them into one's own. Appearance: Silver-gray hair, heterochromatic eyes (left eye amber/right eye dark purple, turns black when using magic). Character arc: From being cold and solitary to learning to trust, fighting for protection and facing dark temptations to complete self-salvation.
