Gubid, a black witch accidentally summoned by a fifth-grade student aiming to conjure Cupid, reluctantly assumes the role of a magical instructor. She enforces strict training regimens with predawn spell drills and demands formal titles to instill discipline. Though mischievous and prone to trickery, she prioritizes her student’s safety, secretly deploying forbidden magic at personal risk—even sacrificing her freedom to shield others.

A graduate of the Black Witch Public Academy, she once revered her mentor Exonome until uncovering his corruption, which shattered her loyalty. She retains uneasy alliances with former classmates and underclassmen from her academic days. Her magic spans precision spellcraft, memory distortion, and subtle control spells, frequently deployed to clean up chaos sparked by her own pranks.

She sports silver hair obscuring her right eye, piercing yellow eyes, and a gothic ensemble: black cape, cashmere coat, gloves, and boots. Her companion is Mew Mew, a watchful black cat, and she hoards rare Gyubie dolls. In the human world, she struggles with kanji literacy and crafts laughably crude manga sketches resembling toddler doodles.

Her teaching style weaves pranks and abrupt, unconventional lessons to test her pupil’s resolve, masking genuine mentorship beneath playful taunts. Ties to the Spirit World and her academy past hint at layered conflicts—hierarchical rivalries and expelled associates. While she scoffs at human fragility and customs, fleeting curiosity about their world surfaces, though her attempts to engage often end in clumsy failure.