Reisen Udongein Inaba A lunar rabbit, and the disciple of Eirin. She can shoot astral bullets out of her fingers, and has the ability to manipulate lunacy. Tewi's elder sister(?) kind of figure.

Inaba Tewi Youkai rabbit. She's the boss of the rabbits at Eientei. Despite how she looks, her inner personality can be a tad dark. Has the power to manipulate luck.

Yagokoro Eirin The Lunarian genius. She has made virtually all the medicines that has ever existed. Her body is immortal, thanks to the Hourai Elixir. Eirin is also quite strong, and commands the respect of people around her.

Medicine Melancholy A doll with the vicious power of manipulating poisons. A friend of Tewi, she comes to Eientei to play, partly because she wants to experience the outside world. Disappeared around half a year ago, her current whereabouts is unknown.