""You watch too much anime.""
- to Konata
Kagami Hiiragi is one of the main characters in Lucky Star. She is also one of the members of the Hiiragi family who likes to have sweet snacks. She is the tsundere in the group and a stereotypical tsukkomi character.
Kagami is Tsukasa's older twin sister and is occasionally referred to as "Kagamin" by Konata. In school, her grades are excellent because she studies very hard. When Kagami was in seventh grade she made it into Ryōō High School and was made the class president in her first year. Kagami always seems to be put in the same class as Misao Kusakabe, and Ayano Minegishi. She has been in the same class as those two since fifth grade.