Chisato Shirasagi enters Yotsuba Women's University as a first-year student and anchors Pastel*Palettes as their bassist. Her long platinum blonde hair cascades nearly to her chest, featuring layered bangs split into three portions that frame her face and distinctive droopy violet eyes. Standing at 152 cm, she shares the title of Pastel*Palettes' shortest member alongside Arisa and Hagumi from other bands. Chisato favors feminine casual attire, frequently incorporating elements like flowers, sheer fabrics, and ribbons. For performances, she often pulls her loose hair back, securing it with a white ribbon or accessories. Her background includes fame as a child actress, though she possessed no prior bass experience before joining Pastel*Palettes. Early in the band's formation, skeptical of its longevity, she planned to depart after their first failure. Aya Maruyama's persistent dedication ultimately convinced her to stay. Beyond the band, Chisato maintains friendships, notably with middle school friend and current roommate Kanon Matsubara, and Kaoru Seta, whom she met in childhood through their parents. Politeness, maturity, and responsibility define Chisato's personality, enabling smooth interactions. She also displays a blunt, occasionally cold demeanor, particularly when annoyed or around Kaoru, whose dramatic tendencies she dislikes. This bluntness surfaces if others insult her bandmates or imply Pastel*Palettes' success rests solely on her. Her long entertainment career fostered realist views, leading to initial clashes with Aya's idealism. Chisato feels embarrassed when others reference her child acting roles and resists assumptions she can effortlessly excel at any task. Significant emotional development marked her youth. In elementary school, she openly confessed fears about classmates' reactions to her acting work, telling Kaoru she felt pressured to suppress her feelings. Over time, she adopted a reserved persona, believing protecting her true self around trusted individuals would ease anxiety about public perception, solidifying her current maturity. Trivia reveals she owns a golden retriever named Leon and has a younger sister who borrows her clothes without permission. She dislikes natto but enjoys tea, refreshing flavors, and acai fruit, and struggles with changing trains. Chisato fears bugs and frogs, is notably poor at drawing, and due to prior food-reporting experience, can handle extremely spicy foods. Her bass resembles a modified Fender Japan Jazz Bass Special. In *BanG Dream! Girls Band Party!☆PICO ~OHMORI~*, Chisato appears with Pastel*Palettes in comedic scenarios centered around the CiRCLE live house. Her interactions reflect established traits, including playful teasing of Kaoru using the nickname "Kao-chan."