Arisa Ichigaya attends Hanasakigawa Girls' High School as a third-year Class A student and holds the student council vice president position. Her family operates Ryuuseidou, a traditional pawnshop, where she lives in a spacious traditional house. The basement of this house regularly functions as the main practice space for her band, Poppin'Party, and is where Kasumi Toyama discovered the Random Star guitar, an instrument crucial to the band's formation. Initially introverted, Arisa often secluded herself indoors, nurturing named bonsai plants like Tamagawa, Tonegawa, and Popipa while browsing online. Despite self-described laziness and limited socialization before joining Poppin'Party, her intellect secured excellent grades. Her sharp tongue and moodiness triggered frequent arguments, especially with Kasumi, rooted in difficulty expressing genuine emotions. Compliments from bandmates easily flustered her, causing blushes, and she reportedly felt loneliness despite denying it [citation:]. Her early piano training occurred alongside Tae Hanazono and Rei Wakana at a music school's Pianist Course, which she abandoned due to lost motivation and middle school exam pressures. She resumed playing after meeting Kasumi, joining Poppin'Party as keyboardist and later adding tambourine to performances. Involvement with Poppin'Party and student council spurred significant growth. She initially upheld a refined, polite "rich girl" facade with strangers like Eve Wakamiya or Misaki Okusawa. Gradually, band interactions fostered openness, revealing her kinder, authentic self. She learned to cherish friendships and group activities, shedding her loner mindset, though her grounded nature and occasional frustration still draw friendly teasing from bandmates [citation:]. Her bond with Kasumi remains pivotal: she showed jealousy when Kasumi practiced with Tae or invited Rimi Ushigome over, reacting tsunderely to Kasumi's affectionate outbursts like after their first Live House Space show. Silent understandings, shy admissions of closeness, and shared-performance dreams reinforced their connection. Her solo song "Su-Suki Nanka Janai!" strongly implies complex feelings toward Kasumi. Physically, Arisa has long, slightly curled blonde hair typically in ribbon-tied pigtails, with spread bangs featuring curled strands and forelocks pinned by cross-shaped clips. Her eyes are gentle light brown or gold. She favors mature, feminine lace or floral outfits with long skirts. Winter wear includes a black lace-trimmed sweater, light-brown high-waisted skirt, black tights, and white pom-pom hair ties. Summer attire pairs a sleeveless striped shirt with a belted yellow high-waisted skirt, black ballerina shoes, and white ankle socks. She often wears necklaces, such as a four-flower piece or red ribbon. She stands 152 cm tall, born October 27 (Scorpio), enjoys anmitsu, brown rice, and hard-boiled eggs, and dislikes leeks. Her family rarely celebrates Christmas. When traveling, she overpacks and always brings a favorite fluffy towel.