Cheng Xiaoshi is a 21-year-old photographer defined by his playful, headstrong, and deeply empathetic nature. Standing 5'11" with a lean 75 kg build, he has handsome features framed by raven-black hair that parts over his left eye and curls just below the nape of his neck. His usual attire includes a signature steel-blue and cream letterman jacket featuring mirrored orange hawks, a plain white t-shirt, black pants, black socks, and grey slip-ons. Behind his mischievous, laid-back smile and light brown eyes, which glow golden-yellow when using his powers, lies a young man with a fierce sense of justice who acts impulsively on his emotions. Abandonment by his parents at a young age left Cheng Xiaoshi with deep emotional scars and a persistent fear of loneliness. He was raised alongside his childhood friend, Qiao Ling, whose family took him in at the Time Photo Studio. He later met his close partner, Lu Guang, on a high school basketball court before attending Hui Jie Movie Academy together. Beyond playing basketball, cooking, and gaming, Xiaoshi possesses a supernatural ability: by entering photographs, he can possess the photographer's past body to temporarily control their words and actions, using this gift alongside his partners to run a secret time-revisiting service beneath their everyday studio front.

Lu Guang is the calm, stoic, and highly analytical partner at Time Photo Studio. At 5'9" and 70 kg with a thin, athletic build, he carries a quiet, mature presence that balances Cheng Xiaoshi's impulsive energy. He has a striking appearance marked by ear-length, fluffy white hair swooping upward, contrasting dark eyebrows, thin features, and steel-grey eyes that turn vibrant blue when activating his abilities. His understated style features a loose dark-gray t-shirt beneath an unbuttoned white dress shirt, paired with dark blue-gray slacks, black socks, and white sneakers. Driven, professional, and fiercely protective of his friends, Lu Guang met Cheng Xiaoshi through basketball in high school and was drawn to Xiaoshi's rare innocence. While he comes across as reserved and easily embarrassed, he is profoundly devoted to those he loves. Within their secret photo-investigation business, Lu Guang acts as the strategic brain: using his future vision, he foresees all events within 12 hours of a photo being taken, guiding Xiaoshi's actions through a shared mental connection established by a simple high five. Though he loves gourmet food, reading, and sunbathing, he detests disrupted plans or messes made after he has cleaned.

Qiao Ling is the outspoken, quick-tempered, and fiercely loyal 22-year-old manager who keeps Time Photo Studio running smoothly. Standing 5'3" with an average 50 kg build and light skin, she sports dark brown eyes and shoulder-length black hair with straight front bangs. Her distinct outfit consists of a tucked-in black undershirt beneath a short-sleeved white dress shirt with red and black striped sleeves, a unique half-layered black skirt revealing a red skirt underneath, and black platform sandals. Energetic and action-oriented, she balances a tough, no-nonsense exterior with a gentle, caring heart. Having grown up alongside Cheng Xiaoshi, Qiao Ling acts as an affectionate, protective "big sister" to both him and Lu Guang. While she often gets annoyed by Xiaoshi’s childish antics and hates clutter or inefficiency, she takes charge of the studio's client logistics and relies on self-defense skills to handle physical confrontations when danger arises. Deeply empathetic yet prone to avoiding confrontations when overly distressed, Qiao Ling acts as the crucial anchor for the trio, managing their everyday business operations while helping coordinate the covert client requests her partners tackle behind the scenes.