Asako Kusakabe

Asako was Yuuji's former master. She took charge of raising Yuuji when his parents passed away. She was both harsh and sweet, capable and incompetent and drilled many of her own values into Yuuji. Thanks to her job of bringing him up, he can at least act normal, but now possesses a strong wariness for the horrors of large women. She also completely and utterly incompetent at cooking as she couldn't even make fried rice. Asako wasn't particularly different from Yuuji; she loved to read. She was content to pass time with a book, a pack of cigarettes, and a pot of coffee especially on rainy days when she didn't have anything particular to do. Spoiler She died one and a half years before Yuuji enrolled to Mihama Academy. (Source: Grisaia no Kajitsu Wikia)