Kyou is the older of the Fujibayashi twins. She is aggressive, foul-mouthed and good at cooking. She has a pet baby boar called Botan.
Kyou was in the same class as Tomoya in their second year, and while they are in different classes the third year they have remained friends. Kyou is the class representative of her class. She owns a scooter which she rides to school, but only her twin sister Ryou and Tomoya know about it. She doesn't want people to know about it, since riding motorbikes to school is prohibited and can result in suspension. When Kyou gets angry at someone, she usually throws dictionaries at them (mostly at Youhei and Tomoya, but Tomoya always dodges them).
In the Clannad movie, Kyou doesn't talk to Tomoya as much as in the anime, and her relationship with Tomoyo is better.
Clannad is an anime movie based on the game by Key. This movie is not relevant to the anime but creates an alternative storyline.