|Japanese name:||宮沢 有紀寧|
She has friends outside of her school, which turns out to be delinquents from other schools. She made friends with the delinquents through her brother, Kazuto, who is also a delinquent, after his death trying to save a friend from an accident. Tomoya learns briefly about the light orbs through Yukine, which are called the symbol of happiness. The light orbs are actually the girl's wishes in the hidden world.
According to the script writers, Yukine was originally intended to be one of the heroines of Clannad, but as her story did not reach their expectations, she was made into a secondary character. However, she was still depicted on the regular edition cover of the PC release, and on the PlayStation 2 release which used the same art as the regular PC release.