Riche Hayashi, formally written as 林リーチェ or 林莉榭, attends high school with an elegance shaped by her affluent upbringing, evident in her distinctive speech and meticulous grooming. She maintains disciplined health habits, avoiding late nights to preserve her poised appearance.

Her mahjong journey began early when her parents brought her to lessons at a local parlor run by Nashiko Jippensha's father. The establishment became a second home where regular patrons nurtured her rapid skill development. Its abrupt closure devastated her just as she gained independence, fueling a heartfelt determination to revive the space—not for competitive glory but to forge youthful memories with friends there.

Thoughtful and polite, Riche occasionally misreads everyday situations due to her sheltered life, most notably in financial matters: she nearly gifted pure gold mahjong tiles worth 200 million yen and almost funded a full parlor renovation herself. Despite such quirks, she shows authentic concern for companions.

In mahjong, she excels strategically while fostering lively games, having learned by observing adults. Physically, she stays fit through routine care but falters at strenuous tasks like hill climbing.

Friends affectionately call her "Riche," with Pai Kawahigashi using "Ri-chan." She shares deep bonds with Nashiko and her father, rooted in the original parlor. After its shutdown, she eagerly helped Nashiko repurpose the vacant site. Online as "Riche Ippatsu," her posts of local spots—like the Sanyo Main Line's yellow train—unintentionally led Haneru Emi to find her offline. During group outings, such as a beach trip, she organized games with assistance from her family's maids.

Born November 11, 2006, she grew up in a household staffed by maids handling daily chores. Locally, she's known for her gentle voice and chic style.