Hiyori is a doujin artist who is also a classmate of Yutaka and Minami. Additionally, she is an otaku who creates her own dōjinshi; her genres are broad, stretching from shōnen-ai to yuri. Hiyori is always searching for a good plot to use in her dōjinshi. Even if she has a moment of enlightenment, she fails to jot down notes about it, which causes to forget what her great idea was about. Called “Hiyorin” by Konata, she tends to be a kind person, but has unfortunate luck. Hiyori has a friendly personality, but is prone to get bashful which leads to simple mistakes during a decisive moment. Hiyori has long black hair, violet eyes, a wide forehead, and is a meganekko.