Poemy's classmate and best friend, is madly in love with her—a fact to which Poemy is (usually) oblivious. Futaba's power allows her to pacify hostile creatures, making them happy and harmless. Rescued from alien clutches by Poemy, she combines this power with Poemy's, and since Poemy is a representation of Earth, this act pacifies the planet's population, resulting in world peace. Her name comes from futa (two) (for which another word is "ni").
Futaba is a parody of Tomoyo Daidouji from Cardcaptor Sakura; in addition to visually resembling the character, she is in love with her magical girl best friend, as was Tomoyo. The only difference is that Futaba is jealous of Poemy's love, where as Tomoyo encourages Sakura's love. Although in the spirit of the show, Futaba's fantasies go a lot further...
(Source: Wikipedia)