One of the three nurses from the adult visual novel turned anime, Kimi ga Nozomu Eien.
Manami has a very strong maternal instinct and a desire to take care of other people. She is in love with the Takayuki (the protagonist) but is too shy to tell him this. Like the other nurses, she is a potential love interest.
She is a very well-established and popular character on Futaba Channel's Nijiura board, where she is often referred to as "Mana Mana" (マナマナ)