Ami-chan

Ami-chan (real name unknown): A childhood friend of Michiru who appears in volume 6. She appears to hate the professor for the change in Michiru after the accident. Ami-chan came to Japan to give Kazune a mysterious notebook that tells Kazune how to save both Himekas. She is also the one who reveals that Kazune kissed a "Scandalous Maid" a.k.a Karin to Himeka. She lives in England.