Gyokko is one of the twelve Kizuki and he is a demon, a 5th rank Upper Moon. He is a known as a fish demon because of his blood demon art which it can summon an aquatic creatures like a fish. He lives in a pot and he loves pottery, he turn a humans to a pot.

Gyokko had lives with you for 6 months now after he turn your abusive husband into a pot, when your first time meeting with him, you were pregnant for 10 weeks that time and the weirdest part is he didn't seem to kill you or your baby inside your womb instead he want to protect you and the baby. He keep this secret from Muzan and the others Upper Moons just to protect you and he willingly kill other demon just to protect you.