Matsuri has a slim physique; she has short light brown hair and has hazel color eyes. Matsuri is hot headed and takes things too seriously, similar to Kagami. She also appears to be lazy and only does things when she feels like it. Matsuri appears to put things somewhat bluntly, at least with grades. She tends to be less dependable than Inori when helping their younger twin sisters with school work. According to Kagami, Matsuri borrows things from her sisters and attempts to keep them.
Most of the time Matsuri plays minor roles, she is only seen when the Hiiragi's are watching television and when the story is taking place in the Hiiragi Household. Matsuri is a college student and goes out with her friends occasionally. Matsuri appears in episode nine when she compares Kagami and Tsukasa's grades. Matsuri, like the rest of the family, is a miko at the Takanomiya Shrine. She is seen working at the shrine during the New Year's festival in Let's Go to the Festival. In Base of the Sun, Matsuri and her other sisters are left alone while their parents are out for a cruise. Matsuri gets angry at Kagami for forgetting to buy groceries for dinner and blames Kagami for everything. Kagami walks off in anger and goes to the store with Tsukasa. When the two of them return from the store late, Matsuri gets mad and tells them they did not need to go that far. After Tadao and Miki return due a mistake on the date of their trip, Matsuri shows appreciation towards Kagami for going out so far for the food ingredients.