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Rihoko Sakurai (桜井梨穂子)Age: 16-17
Club: Tea Club
Height: 164 cm
Weight: 57 kg
Birthday: April 12
Blood type: A
She is Junichi's childhood friend who, despite having a big appetite, avidly reads the dieting books in their school library. She is a member of the Tea-Making Society.
Riihoko's arc is the 5th in the Anime.