Oh My Goddess! Omnibus

"The demonness Mara descends with a plot to possess the body of Keiichi's little sister, Megumi, which leads Skuld to build a new character, Mini-Banpei RX, to combat their rival. Then, at a mountain resort, the ghost of a long-dead maid takes form, and Mara strikes back by conjuring a trio of killer ninja masters"--