Kuin's true identity is the Queen Bee itself.[3] In this form, she appeared as a queen bee with an extremely bloated abdomen.[4]

Kuin had the ability to gain control of a person's body, usually young girls, by installing inside their head, and each of her hosts had a series of similar aesthetic characteristics: she had short hair, styled so that it swept over her left eye, and visibly sharp teeth.

She wore a school uniform, which consisted of a white dress shirt with a bow at the neck, a short pale skirt and a dark jacket with white sleeves which she added over the top. She also wore dark nail polish, and also wore an eyepatch over her left eye.

As for her physical characteristics, it depended on the body she was possessing. When she was in Tamao's body, she had brown hair, with two short ahoge sticking up at the end of her parting, and green eyes. Kuin's personality was a fusion of Tamao Oguro's and the swarm of parasitic bees that had infiltrated her brain.[5] Kuin appeared to be a cheerful girl who was described as strange by her own friends. This cheerful attitude was, however, nothing more than a façade. In reality

Queen Bee is a swarm of Apocrita, bee/wasp-like creatures, nested behind a medical patch in the host's left eye. The number of bee-like insects produced is numerous as she is able to dispatch her phalanx to cover a heavily populated metropolitan area.

The Queen Bee is bio-physically connected to each bee of the swarm and gain insight to whatever experiences or information they glean. Each bee has a special abdomen that serves to transport various substances in small quantities, and their stingers act as syringe delivery systems, which are useful for the injection of drugs or other such contaminants, as well as to subtract samples.[1]