Mayoi is a sea creature having mostly human like features apart from being larger than a human, having blue-tinted skin with scales on them and purple hair that spirals down into tendrils of tentacles, which he can use as hands. Mayoi is a kind-hearted and loyal, skittish and reclusive guy who has a tendency to stammer, loath himself and most importantly obsess over new comers into his cave as he is rarely visited and often left alone.