Colette, a first-year Tsukimori Middle School art club member, sports long blonde hair tied back with cascading bangs and bright green eyes accentuated by a notably luminous forehead. Originally relocating to Japan for her parents’ careers, she continues residing there alone after their return abroad, her living arrangements undefined.

A playful trickster, she routinely dodges club responsibilities with inventive excuses, citing apocalyptic dangers as her latest justification. Whimsical curiosity drives antics like vandalizing a mannequin head and concealing the evidence, sparking chaotic misunderstandings. Despite her mischief, she radiates childlike openness, spontaneously hugging peers or interlacing fingers during conversations.

She admires Mizuki Usami as a surrogate older sister, engineering scenarios to advance Mizuki’s unvoiced crush on Subaru Uchimaki. Maria Imari earns her devotion as “master,” partnering on absurd missions like hunting imaginary forbidden texts. Interactions with Subaru involve cheeky banter punctuated by unwitting interruptions of his 2D artwork.

Notable exploits include igniting club-wide scandal by uncovering an adult magazine during a treasure hunt and flunking exams until Mizuki intervenes with crash-course tutoring. A locket containing an unexplained selfie dangles from her neck. While her pranks unleash pandemonium, sporadic earnest gestures—protecting friends from trouble or quietly observing their joys—hint at concealed depths beneath her whirlwind persona.