Moka Akashiya is a female Vampire considered to be the most beautiful girl in Yōkai Academy and is the first person Tsukune Aono meets when he sets foot in the yōkai realm. Exceptionally sweet and kind, Moka takes a liking to Tsukune, after ingesting his blood, and becomes addicted in doing so. When the Rosario Cross around her neck is removed, the seal keeping her inner nature is released. Cold and arrogant, the Inner Moka is a completely different entity from the kind, loving Moka, going so far as to specifically remind Tsukune to "be kind to the other Moka". Tsukune is the only one able to remove the Rosario Cross around Moka's neck.
It is revealed that Outer Moka is actually a fake personality made by the sealing ceremony of the Rosary. Inner Moka is closest to the original Moka save for repressed memories. Furthermore, Akasha Bloodriver has told Inner Moka that the only person who can remove the Rosario is someone who means her no harm.