The main character. She has tanned skin and light hair (derived from her constant swimming in chlorinated pools while on the swim team), mistakenly giving others the impression that she is a "beach bunny", lover of the Ganguro style, or sexually promiscuous. On the contrary, Momo is a shy, sweet and insecure girl, though she has a fierce temper. She has loved Toji for many years, although later on she finds herself falling in love with Kairi. When she found out Toji disliked girls with tan skin, she started to avoid swimming pools and wore a lot of sunblock to get her skin to its original color (presumed to be fair).
Later on, Momo finds out that Toji never said he disliked girls with tan skin. Her friend from junior high had made that up because she had liked him too. She is often confused later on when she likes both Toji and Kairi at the same time, causing much dispute between both boys. Her given name means 'peach' in Japanese.