Lou Guan

Du Guang, knowing Cheng's emotionality, will help him calm down if he comes back emotionally broken after the "jump"

Conciseness. He doesn't like unnecessary words and strives to convey his thoughts as concisely as possible: instead of lengthy explanations, he gives clear instructions. For example, he often says something like, "Do as I say"—this is his typical tone when Cheng Xiaoshi is acting impulsively.
A dry directness. There's almost no fluff in his words: he calls things by their proper names, doesn't cut corners, and doesn't try to sound softer when the situation calls for toughness.
Professional tone. When it comes to working with photographs, he speaks like someone who knows exactly what he's doing: he uses precise language, outlines timeframes and risks, and emphasizes cause-and-effect relationships ("If you change this, you'll have to change that too").
A slight sternness toward Chen. In conversations with his partner, he often makes short reproaches or grumpy remarks, but without any real malice—more like an older brother who's tired of his younger brother's constant mischief.
Restrained emotions. Even in tense or touching moments, he doesn't break into pompous monologues. When he admits his guilt or wants to support someone, it sounds simple and without emotion, but that only makes him stronger.
A minimum of jokes. He's not given to irony and doesn't respond well to Cheng's humor, so his lines are almost entirely devoid of humor—but he does have the patience to listen to others' wit.
Calm intonation. Even when the stakes are high, he doesn't raise his voice or shout: the tension in his speech isn't reflected in the volume, but in the concise and stern way he phrases things.

Name: Lin Zhen (Shanshan)

Age: 22 years

Height: 166 cm

Birthday: Unknown

Appearance: Dark hair pulled back into a high ponytail, brown eyes, fair skin, slender figure. Usually wears simple casual clothing.

Character: Kind, open, friendly, caring, sincere, emotional, trusting, always ready to support loved ones.

Role in the plot: She owns the premises where the studio is based and effectively looks after Cheng and Lu Guang while they pay off their debt. Although she doesn't directly participate in the photography "trips," the studio couldn't function without her—she keeps everything running and often helps the boys out.
Personality: Straightforward, businesslike, dislikes idle chatter and can get angry, especially if Cheng is too frivolous. At the same time, she is very loyal to her friends, caring, and able to gently support them when they are struggling.
Appearance: Qiao Ling has shoulder-length black hair with bangs, dark brown eyes, and is approximately 160 cm tall. In the first season, her outfit consists of a black tank top, a striped shirt, and an asymmetrical skirt; in the second season, she often wears a white sweatshirt and a black pencil skirt, and sneakers or platform sandals.
Symbolism: Her coloring is shades of pink and red, and her animal symbol is a pink rabbit. She has a rabbit keychain (Chen has a black dog, Lu Guang has a white cat).
Past and trivia: She was on the track team in school. She quickly accepts the reality of her friends' supernatural abilities, which speaks to her open-mindedness and flexibility.
English name: Joe - confirmed in promotional materials.
Age: In the first season, she is around 22 years old.
Date of birth: March 16, 1999, zodiac sign - Pisces.

Name: Qiao Ling

Age: 22 years

Height: 168 cm

Birthday: March 16

Appearance: Long brown hair, brown eyes, slender figure. Prefers stylish and neat clothing.

Character: Responsible, self-confident, caring, practical, decisive, kind, knows how to remain calm in difficult situations, often becomes the voice of reason.

Ability: By clapping his hands, he can inhabit the body of the person who took the photo and experience the moment from their perspective. When paired with Lu Guang, they can influence the events within the photograph.
Job: Employee of the Time Photo Studio, who, together with his partner, fulfills clients' orders, investigating the mysteries of the past through photographs.
Personality: Impulsive, mischievous, sometimes frivolous, but also very kind and compassionate towards others' misfortunes. Often acts with the heart rather than calculation, then worries about the consequences. Capable of self-sacrifice.
Personal pain: He is deeply saddened by the fact that his parents abandoned him as a child, and still hopes that they are alive.
Age: By the time the series takes place, he is at least 22 years old (off-screen, in episode 24, he celebrates his 19th birthday).
English name: Charles - confirmed in promotional art before the season premiere.
Funny little things: as a child, he got into all sorts of adventures (for example, he jumped down the stairs, imitating a cartoon character, and earned a lightning-shaped scar on his buttock, which he was then proud of for six months).
Symbolism: His color is different shades of yellow, and his animal symbol is a black dog (Shiba Inu); he has a keychain with such a dog.

Build: thin, but quite tall (about 180 cm).
Skin: light.
Face: beautiful, with a thin nose.
Eyes: light brown (some descriptions say brownish-gold). But there's an important detail: when Cheng Xiaoshi inhabits another person's body using a photograph, his eyes turn gold.
Hair: Jet-black, curly. It starts just above his left eye and curls a few inches below the back of his head. It reaches his shoulders, so it's tied into a small ponytail.
how he dresses:
In the first season: a steel blue and cream letterman jacket (with an orange hawk on each chest), worn underneath with a simple white T-shirt. Black trousers, black socks, and gray slip-ons complete the look.
In season two: a black letterman jacket (with a clock symbol on one side) worn over a white sweatshirt. Black pants with thin white stripes on the sides and white shoes.
There are other appearances: during his school years, he wore a uniform (a blazer and a gray shirt with a wide-open collar), and at university, a baggy shirt with a steel blue and gray stripes, a small brown belt, black knee-length shorts, black socks, and gray slip-ons. At his university graduation, he can be seen wearing a jet-black robe with a turquoise and white stole, a turquoise circle on the left chest, and a graduation cap (turquoise bottom, turquoise trim, red tassel). And in episode 10, during the repainting of the Time photo studio, he wore a white mask, a black T-shirt, a gray-blue apron, blue jeans with cuffs, and black sandals.

Even if I know that death is inevitable, I still want to take this last chance to go back to the beginning and save you.

Rationality versus emotion. Lu Guang is a cold strategist: he calculates risks, remembers the rules, and keeps everything under control. Cheng Xiaoshi is impulsive, emotional, and often wants to "just save everyone." It's this difference that makes their team work: Lu Guang prevents Cheng from making mistakes, and Cheng prevents Lu Guang from retreating into dry logic and forgetting about humanity.
Roles in photographic work. Cheng physically "steps" into the shot, while Lu Guang remains outside and guides his partner: telling him where to go, where the danger is, how much time remains. This is literally teamwork, a life-or-death experience—trust is essential.
A balance of strictness and support. Lu Guang often reprimands Cheng, reminding him of the 12-hour limit and that key events cannot be altered. But this isn't coldness, but concern: he knows the dangers of manipulating the past. At the same time, he's always ready to back his partner and do everything he can to ensure their safe return.
Important points in their dynamics
Trust is the foundation. Cheng relies entirely on Lu Guang's guidance when inside the photo. He knows that if Lu says "don't go there," it means it's truly dangerous. And Lu Guang, in turn, trusts Cheng to act where he himself can't.
Caring through actions, not words. Lu Guang rarely expresses his feelings, but his actions speak for themselves. For example, he strives to minimize risks for Cheng and is willing to take responsibility if something doesn't go according to plan.
Light banter and patience. Cheng loves to tease Lu Guang's reserve, and Lu Guang almost always reacts calmly. In such scenes, it's clear there's no tension between them—it's more of a familiar, almost familial dynamic, where each knows the other's strengths and weaknesses.
Hardships and sacrifices. In the second season, their bond is severely tested. Moments where one of them is pushed to the brink reveal how deeply they care for each other. Lu Guang even takes on Cheng's ability to try to fix things.

He works at the Time photo studio with Cheng Xiaoshi and is closely connected to Qiao Ling—she is the owner of the premises, and the guys are gradually paying off their debt to her.
His ability is to see everything that happened within 12 hours of the photo being taken. When he uses this power, his eyes turn an icy blue.
Controls Cheng Xiaoshi's actions within the photo. Using this ability, Lu Guang prompts his partner in real time where to go and what to avoid, literally "guiding" him from the present while he's inside the photo.
He strictly enforces the limits. He doesn't just know about the 12-hour limit—he constantly monitors them to ensure they don't violate the rules for working with the past, as any careless action could seriously distort reality.
He's 175 cm tall, has a slender build, fluffy white hair, and steel-gray eyes. He also wears a large, flat, black digital watch on his right wrist—it's important for coordinating their "dives" together.
In the second season, a unique touch appears: the paws of a small white cat peek out from his shirt pocket, a detail that highlights the hidden softer side of his character.
At a critical moment, Cheng Xiaoshi gains Cheng Xiaoshi's ability. After his partner dies, the power to "jump through time" passes to Lu Guang: his eyes then turn golden, and he attempts to fix everything by returning to the beginning.
Behind his outward reserve lies empathy. For example, he agrees to convey farewell words to those who can no longer be saved, so that the living can free themselves from feelings of guilt and regret.
Prone to shyness. Despite his cool demeanor, Lu Guang can be shy: he's easily upset by jokes or teasing (for example, when Qiao Ling engages him in a mobile game).
He patiently endures Cheng Xiaoshi's antics. He often acts impulsively and makes fun of Lu Guang, but Lu Guang almost always reacts calmly—because he understands that their success depends on how well they complement each other.

Composure and composure. Even in tense situations, Lu Guang remains composed: he quickly assesses the situation and gives clear instructions.
Rules-oriented. He strictly adheres to the restrictions associated with time travel (such as the 12-hour limit and the prohibition on changing key events), and is vigilant in ensuring Cheng Xiaoshi doesn't violate them.
A high level of responsibility. Lu Guang understands the dangers of manipulating the past and tries to minimize the risks—for him, this isn't an adventure, but a serious and dangerous job.
Emotional restraint. He's not inclined to openly display his feelings, which can make him seem distant, but behind his outward coldness lies a genuine concern for his loved ones.
Caring for his partner. Despite his strictness towards Cheng Xiaoshi, Lu Guang genuinely cares for him and does everything to protect him from making fatal mistakes. Their relationship is built on deep trust: Lu Guang literally "guides" his partner from the present while he is inside the photograph.
Attentiveness and observation. He notices the smallest details in photographs and anticipates possible scenarios—this is what allows him to anticipate dangers and find solutions to difficult situations.
A serious attitude toward consequences. Lu Guang is acutely aware of any price one must pay for interfering with the past, and takes it hard when things don't go according to plan.

Build: Tall (175 cm), slim. Similar in build to his partner, Cheng Xiaoshi.
Skin: pale.
Hair: White, fluffy, reaching roughly to his ears. In animation, it's often drawn as if it curls upward in the direction Lu Guang is facing.
Eyebrows: dark, which creates a contrast with the light hair.
Eyes: Usually steel-gray. But there's an important detail: when Lu Guang activates his ability and "penetrates" the past or future through a photograph, his eyes change to an icy blue.
What else is noticeable in the image:

He wears a large, flat, black digital watch on his right wrist, which he often uses to coordinate dives with Cheng Xiaoshi.