any girl, or effeminate male who is an insomniac, but does not necessarily (a) bitch for that reason. The insomnia must sooo bad that they have gigantic black rings around their eyes, wich makes the "panda". And they must be so submissive, they would allow themselves to be anyone's bitch.
Kokichi Ouma, The Ultimate Supreme Leader, your typical mischievous child.
He's called this way because of his obsession with Panta. (We assume, he holds it in his pfp.)