Yumi Morita, or Yumi Mori, is Haruki Hayashida's childhood friend who she later marries. She also appears in the extra manga chapter of the 4th Blu-ray & DVD volumes. Yumi Mori has a slim build with wide eyes and shoulder-length black hair. When she was in kindergarten, she was more rotund with shorter hair styled in pigtails and prominent sharp teeth. At age thirteen, Yumi Mori had relatively longer hair and a smaller build. She commonly wore a black sailor uniform and a gentle smile. Yumi Mori is a reserved modest woman. When she was in kindergarten, she was a free-spirited girl who had a strong will and determination. She often challenged children her age and fought them, which made her become feared and seen as ruthless by many.