Lin Yu

Biodata

Background / History

Art and University Life

Lin Yu liked drawing from childhood and began formal study in eighth grade. Although he eventually majored in computer science, he continued practicing art, selling his work and posting drawing videos to attract clients. His café manager praised both his technical foundation and his individual style 5 8 19.

He began working at the Time-Gathering Corner during his sophomore year and had remained there for almost two years. He also moved out of the university dormitory to find a quiet place to create without disturbing his roommates 6 38.

Taking in Firefly

After working from morning until midnight to finish a drawing, Lin Yu discovered an unfamiliar woman on his couch. Initially dismissing her as an exhaustion-induced hallucination, he armed himself with a baseball bat and brought a blanket when he realized she was real. Her transformation into Sam convinced him that she was Firefly from Honkai: Star Rail, a character he already knew and liked 1 2.

Lin Yu explained that Glamoth did not exist in his world and showed her the game depicting her likeness and history. Recognizing that she had neither a legal identity nor a way home, he offered her accommodation and help. He gave her the bedroom, slept on the couch, and lent her a spare phone 2 3.

He subsequently helped her learn everyday routines, use local technology, and understand shopping and money. He also guarded the secret of her arrival from another world, avoiding questions that might expose her origins 4 6 20 39.

Camping and Unwanted Publicity

During their first camping trip, Lin Yu needed Yang Chenyu’s help to pitch his tent. The encounter introduced him and Firefly to Yang’s girlfriend, Su Qingxiao, and the four shared a campsite and meal 13.

When Firefly asked what “girlfriend” meant, Lin Yu falsely described it as someone one lived with and agreed that this made him her boyfriend. His internal apologies establish that this was an improvised explanation, not a genuine confession 13.

Videos of Firefly controlling a swarm of fireflies later went viral. Lin Yu checked that their faces were absent from the footage, reassured her that she had done nothing wrong, and asked their new friends to keep the malicious comments from her 15 16.

Academic Opportunity and Streaming Work

As his final university year began, Professor Zhou sought to take Lin Yu as an apprentice. Counselor Su Qingyan relayed a one-month deadline for his decision. Zhou also contacted his parents, but his mother insisted that the choice belonged to Lin Yu; his acceptance remains unresolved in the supplied chapters 25 30.

Meanwhile, Lin Yu helped Firefly pursue online content creation as a way to earn money without a local legal identity. He bought streaming equipment, designed her virtual avatar, prepared videos, and taught her editing. He promoted their collaboration to his own audience while initially keeping her identity secret 9 11 19 29 31 34.

After an all-night work session and an extended café shift, Lin Yu was caught in heavy rain and developed a fever. Firefly accompanied him to the hospital and cared for him at home. He largely recovered after one day and used his remaining sick leave to continue teaching her 31 32 33 34.

Their collaboration included Human: Fall Flat, in which Firefly carried him through the levels. When her debut earned more than five hundred, he celebrated with dinner and a homemade Oak Cake Roll prepared in the café kitchen 36.

Recognizing His Feelings

Encouragement from his university friends prompted Lin Yu to examine his feelings for Firefly. His sister’s Mid-Autumn Festival visit brought further teasing and questions, while Firefly gave him gouache paints as thanks for caring for her 27 38 45 46.

Lin Yu eventually recognized that Firefly had become part of his life without his noticing and that their time together had been his happiest. His hesitation came from fear rather than uncertainty about his attraction: he had seen many relationships fail through arguments, incompatible views, and an inability to accept flaws 47.

After Zhang Zeyang encouraged him to act, Lin Yu invited Firefly to visit a popular attraction. She accepted, but the supplied chapters end before the outing or a confession takes place 49 50.

Appearance

• Height: 179 centimeters 2.
• Hair: Black, falling naturally over his forehead 15.
• Streaming avatar: A youthful, chibi-style white-haired catboy with cat ears, round black-framed glasses, sapphire-blue eyes, and a small round face 36.

Personality

Lin Yu is attentive in practical, everyday ways. He gives Firefly his bedroom, chooses toiletries in the pale green he associates with her, and quietly buys pajamas she admired while shopping. His care does not depend on her earning money or proving useful to him 3 4 7 9.

He is protective but recognizes that Firefly has choices of her own. Although he would struggle with her departure, he resolves to respect her decision if returning to her former world becomes possible. He also encourages her to make friends rather than rely exclusively on him 13 20 46.

Romance easily flusters him. Having never dated and having little experience interacting with women outside his family, he becomes embarrassed by shared utensils and accidental intimacy. With friends and his sister, however, he is more teasing, deliberately withholding answers and enjoying Yuyou’s frustration 7 17 27 46.

His dedication to creative work can become overwork. He repeatedly stays up to meet deadlines, and one prolonged stretch leaves him facing a café shift without sleep 1 3 31.

Abilities & Skills

Drawing and Painting

• Produces artwork for paying clients and ships completed pieces 5 8.
• Works in oil painting and designs virtual characters; his two café paintings are praised and displayed by the manager 19 31.
• Uses experiences with Firefly as inspiration for drawing videos and offers the resulting artwork through sales and giveaways 34.

Content Creation and Livestreaming

• Maintains an art-focused account, fan group, and livestreaming audience 8 34 35.
• Teaches Firefly computer use and video-editing software, and helps prepare her account and streaming debut 10 31 34.
• Designs her avatar and organizes a collaboration with his own channel 19 29 34 36.

Cooking and Baking

• Prepares everyday meals and teaches Firefly ingredient preparation and cooking methods 2 7 16.
• Salvages the usable dishes from her first unsuccessful dinner rather than discouraging her 7.
• Makes an Oak Cake Roll for her streaming-success celebration 36.

Photography

• Regularly volunteers to take photographs because he dislikes appearing on camera; the habit develops into an interest in photography 28.
• Records their camping trip and campus visit, eventually agreeing to appear in Firefly’s photographs when she asks to keep memories of them together 13 28.

Gaming and Physical Limits

• Has completed difficult games, including Sekiro, though Firefly’s rapid progress surprises him 10.
• Is substantially weaker than Firefly: he cannot free his wrist from her grip and becomes exhausted chasing her through the apartment 1 2 10.
• Cannot initially pitch a tent successfully, even with online tutorials 13.

Equipment / Items

• Electric scooter — His regular transport for café shifts, shopping, campus visits, and taking Yuyou back to school 6 7 25 46.
• Baseball bat — Bought at a convention and retrieved as a precaution when Firefly first appears 1.
• Spare phone — Lent to Firefly for communication, videos, and learning about Blue Star 3.
• Art supplies — Includes brushes, a drawing board, and gouache paints given to him by Firefly for the Mid-Autumn Festival 19 45 46.
• Laptop and streaming setup — Used for avatar work, video production, and online broadcasts 11 31 35.

Relationships

• Firefly — Housemate and romantic interest. He provides shelter and helps her build an ordinary life; she reciprocates through housework, nursing him, and a gift bought with her earnings. Both develop feelings, but she conceals hers because of her unresolved Entropy Loss Syndrome, while he is preparing to take a step forward 3 32 42 45 47 50.
• Lin Yuyou — Younger sister. Their relationship mixes teasing and roughhousing with affection and practical care. She actively tries to bring him and Firefly together; he promises to grant her a wish if she enters a good university 39 44 46.
• An Shuqing — Mother and the household’s strongest authority. She supports his right to choose his future while insistently urging him to find a girlfriend 30.
• Lin Chengting — Father. Like Lin Yu, he generally defers to An Shuqing at home 30.
• Zhang Zeyang — College friend and former dormmate. Offers him work at the Zhang Group, discusses romantic uncertainties with him, and urges him to confess to Firefly 22 38 49.
• Wang Haonan and Li Wei — Dormmates who remain close after he moves out. They invite him to gatherings and support his developing relationship with Firefly 27 38 47.
• Café manager — Employer who encourages his artistic ambitions, treats employees as family, and lends him the café kitchen for Firefly’s celebration 8 19 36.
• Professor Zhou — University professor seeking to take him as an apprentice; contacts both his counselor and parents to encourage his acceptance 25 30.
• Su Qingyan — University counselor who relays Professor Zhou’s deadline 25.
• Yang Chenyu and Su Qingxiao — Friends met while camping. Yang helps with his tent, while Su enthusiastically supports the apparent pairing of Lin Yu and Firefly 13 15.
• Auntie Liu — Parcel-station acquaintance who handles his art shipments and urges him to pursue Firefly 5 6.

Notable Quotes

“Until you find a way back, you can stay at my place. I’ll help you, too.” 3

“If you ask me why, maybe it’s because I’d worry.” 3

“These are memories that belong to you alone. I can just stay beside you as a witness and record them.” 28