Hikari Tsuneki (常木 耀 Tsuneki Hikari) is a main character of Seiren. She is the class idol of class 2-B at Kibito High School and a classmate of Shouichi Kamita who was the runner-up of last year's "Miss Santa Contest" that she has an exclusive seat on the terrace.
Hikari is a always cheerful girl who is occasionally stubborn.
Hikari is a "modern day meddling princess" who has a part-time job working as a cook in a restaurant and she just focus in her part-time job.
- The name Hikari means "shine, sparkle, glitter" (耀).
- Hikari's surname Tsuneki means "always" (常) (tsune) and "tree, wood" (木) (ki).
- Hikari loves to eat.
- Hikari was Tooru Miyamae's Playmate before, but it dissolved after that.
- Hikari does less housework.
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