Height 151 cm Lala's younger sister and Nana's twin; they are introduced when they have most of the characters in a virtual game world created by Lala that they subsequently modify. They claim they did this to determine the nature of their sister's friends and to test Rito's affection for Lala. Momo has short hair and is generally sweeter than her twin, but develops a bad attitude whenever Nana takes credit for what she does; she shares a connection to plant life. She also has a strong attraction towards Rito (similar to Lala's), stating how his facial expressions are lovely and even letting him touch her tail. At times, she would even sneak into Rito's bed at night and stating how jealous she was of Lala that Rito's hand was stuck to her tail. Momo and her twin are currently on Earth, running away from their studies. Also, Momo has a special ability to talk to various alien plants. Which she summons through her phone that Lala made for her and her sister.

Spoiler

Of all the women that have feelings for him, Momo is the most protective of Rito as shown in her intense anger to anyone who she feels may or​ has brought him harm.