Wakakusa Nanoha

Kou's childhood friend who is a year younger than him. Kind, sensitive and talented at gardening and cooking, she often bursts into tears at the slightest provocation.
Her parents were researchers at the Drexler Organisation and mentors to Kurihara Naoki until they were killed in a terrorist attack. After the events of Grey Christmas, she becomes the keeper of an internet cafe Kou and Rain unwittingly frequent.