Lucy Maria Misora (ルーシー・マリア・ミソラ Rūshī Maria Misora ), also known as Ruuko Kireinasora (るーこ・きれいなそら), is a mysterious girl who is also Takaaki's classmate.
Lucy claims to be an alien and has the ability to commune with animals. One of her strange tendencies is to raise up her arms and say rū (るー). She refers to humans as ū (うー).
She has piercing crimson eyes with a hint of purple, and very long lavender hair.