Momomi Kiyashiki is one of the main antagonists in Strawberry Panic. She is the "sidekick" of her girlfriend, Kenjou Kaname, and helps her with her schemes. But, she did not know, Kenjou always admired Amane. After Kenjou's declaration to Amane and stimulates Amane to join in the Etoile's votation (ruining her own scheme), Momomi broke up with Kenjou.

After, Momomi turns back Kenjou girlfriend. Kenjou is a fair rival, but the maker of evil schemes, and Momomi hates the nobility of Kenjou.

She is, together of Kenjou, the main comrade of Tōmori.