Sasuga Chisa, a 13-year-old second-year junior high student, radiates an enigmatic charm as a member of the Sirius theatrical troupe, her persona marked by a Light Salmon motif. A prodigy capable of rapidly mastering and applying new skills, she quietly idolizes her childhood friend, Panda Yanagiba. Her self-paced, mysterious aura blends a striking appearance with an unconventional worldview, often drawing curiosity.

Onstage, Chisa commands attention with magnetic confidence, yet offstage, her airheaded, food-centric quirks surface—easily bribed with treats and prone to whimsical actions like wandering amusement parks without riding attractions. Though reserved, her remarks unveil unexpected depths, such as expressing regret over missing magical lessons rather than coveting the lead role when Kokona Ōtori starred in "Aladdin."

Her innate "Sense" ability channels extraordinary luck, seamlessly turning performance mishaps into dazzling moments, though its potency favors those "loved by Heaven." The name Sasuga ("as expected") and Chisa (fusing "knowledge" with "clarity") reflect her composed intellect and serene unpredictability. Standing tall alongside Hatsumi Renjakuno as Sirius’s tallest member, she contributes musically, including a collaborative duet with Panda in the anime’s eighth episode.