|School:||Shiraitodai High School|
|Grade:||Alumna (3rd year during Teru's 1st year in high school)|
|Debut:||Saki, round 169|
Playing Style / Abilities
National Tournament Arc
Rune first appears during a flashback of Teru's. She is playing on her phone when Teru and Sumire Hirose interrupt her. They invite her to join an improvised team for a match. Her team ends up winning the match and she is very excited.
After Teru walk out, Reika says that they must be close. However the girls tell her that they aren't and that it was simple advice that allowed them to win. Sometime later in the cafeteria, Rune and the others seek out Teru and request something of her. They ask her to help coach the other girls because they can't be satisfied if they get chosen to represent the school that way. Rune then asks the rest of the club members to listen to Teru's advice.
Later, it is revealed all the girls have gotten stronger thanks to Teru but the original girls remain very strong. When Teru and Sumire sit down to play, the other girls in the club were very hesitant and afraid to lose. Rune sits down at the table and says such defeats are essential. When the table is complete they begin the match and Teru busts all three players.