Moka Akashiya (赤夜 萌香, Akashiya Moka) is the first person Tsukune meets when he sets foot in Yōkai Academy. Exceptionally sweet and kind, Moka is a vampire, and takes a liking to Tsukune after ingesting his blood, becoming addicted in doing so. When the rosario around her neck is removed, the seal keeping her true nature is released. Cold and arrogant, "Inner" Moka is a completely different entity from the kind and loving "Outer" 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 around Moka's neck. Both Mokas are voiced by Nana Mizuki in all media.
Revealed in an omake, she loves tomato juice, but prefers Tsukune's blood. Her name is perhaps a pun on the word "mocha", as well as reflecting her split personalities, as mocha is a combination of coffee (representing Inner Moka) and cocoa (representing Outer Moka, as well as being the namesake of her half-sister).