Nan Jiayu

Biodata

Feature	Information
Name	Nan Jiayu (南嘉鱼)
Alias(es)	Little Fish; Hellcat; Cat-Cat
Species/Race	Catfolk / beastkin
Gender	Female
Affiliation	Villain Interest Group
Occupation/Role	Rongcheng Medical College student; villainous magical girl
Status	Active
First Appearance	Chapter 9

Power Progression

Stage / Realm / Level	Chapter	Notes
Shadow of the Stars	208	Hellcat's Guardian Star shattered to unlock this one-time ultimate form while she defended Heartmoon Fox against Leviathan. The spent fragment left her unable to protect Fox Fox in the same way afterward. 208 209

Background / History

Nan Jiayu studied in Shencheng before coming to Rongcheng. She was withdrawn, struggled to fit in, and was bullied in middle school; hostility toward beastkin in Shencheng left her with few friends. Nan Xiaofeng recalls that Jiayu was once short-haired, reserved, and notably tougher in demeanor. 210 707

While walking alone one night, Jiayu found a Guardian Star and transformed into a magical girl, only to discover that she had been designated a villain. Without the Blessing of the Stars or a stable Star Realm supply, she needed to replenish her magic regularly or risk becoming too depleted to move. Detection Magic led her to seek out people with magical talent, including magical girls. 37 60

Before her friendship with Su Tianqing, Jiayu had considered Hyacinth as a source of magic. Heartmoon Fox's earlier draining of Hyacinth forced her to wait, however, and Jiayu instead became fascinated by Fox Fox's broadcasts. 10 38

Appearance

Nan Jiayu is a petite, dark-blue catgirl with ocean-blue feline eyes, cat ears, and a prominent tail. Her narrowed gaze can appear predatory enough to frighten animals, while her usual civilian appearance is described as having a dashing, lightly dressed catgirl style. 10 19 24

• Dark-blue catfolk appearance. 138 690
• Bright ocean-blue eyes that narrow into feline slits when she focuses on prey or danger. 10
• A highly expressive cat tail, which may puff up when startled or betray her happiness around Su Tianqing. 112 200
• Often dresses more fashionably after becoming close with Tianqing; her sister notices the contrast with Jiayu's former habits. 292

Personality

Jiayu is naturally quiet and prone to bottling up worries rather than sharing them. She can be stern—particularly when tutoring Nan Xiaofeng—but is deeply responsible toward the people she considers family. 18 92

Her villainous past gave her a practical, survival-focused outlook, including a willingness to view magical power as a resource. Yet she repeatedly struggles with guilt over that mindset, especially after forming genuine attachments to Tianqing, Lin Muyao, and the other girls. 60 78

She enjoys fighting and is confident in her close-quarters ability, but her strongest instinct is protection. When the Razor Monster cornered Tianqing, Jiayu chose to reveal Hellcat rather than abandon her; later, she spent her Guardian Star's final power protecting Fox Fox from Leviathan. 155 208

Abilities & Skills

Hellcat Transformation

Jiayu transforms into the villainous magical girl Hellcat, wielding Astral Magic despite lacking a stable magical-power supply.

• Can sense unusually dense magical power in others, as shown when she detected Lin Muyao's exceptional reserves. 60
• Uses Astral Magic to evade or counter certain Hero Association abilities. 61
• Requires regular magic replenishment; severe depletion can leave her unable to move. 60
• Previously replenished herself from magical girls and other magically gifted targets; monsters can serve as an inferior emergency source. 155 201

Close-Quarters Combat

Hellcat is an experienced close-range fighter whose combat skill and reactions exceed many magical girls with comparable magical reserves.

• Cat Fist Form — a documented Hellcat form associated with her melee fighting style. 102
• Shrike Form — allows her to fly, enabling rapid aerial escape while carrying another person. 155
• Her combat reactions and beastkin physical advantages let her suppress Hyacinth despite their comparable total magic power. 399
• She retains a strong appetite for battle and offers more inexperienced villains guidance in fighting. 127

Shadow of the Stars

Hellcat's ultimate form emerged when her Guardian Star broke during the Spike City crisis.

• Activated as a one-time power in response to Leviathan's attack on Heartmoon Fox. 208
• Allowed Jiayu to fulfill her determination to protect someone important despite being a villain magical girl. 209
• The transformation exhausted the final Guardian Star fragment she had carried since Shencheng. 209

Athleticism and Recreational Skills

Even untransformed, Jiayu possesses exceptional catfolk speed, stamina, coordination, and reflexes.

• Dominates ping-pong matches and is praised for her fast reactions. 62 78
• Performs powerful badminton smashes and difficult returns that draw applause. 690
• Earned an SSS+ rating on a Level 15 MaiMai rhythm-game song. 138
• Previously joined a mountaineering club and climbed multiple snow-covered mountains without equipment. 474
• Forms a formidable beach-volleyball pair with Nan Xiaofeng. 235

Items

• Guardian Star fragment — A fragment Jiayu had carried since Shencheng; it enabled her final Shadow of the Stars transformation before shattering. 208 209
• Golden cross-shaped star — Kept with her phone during her early days in Rongcheng. 10

Relationships

• Su Tianqing / Heartmoon Fox — Jiayu's classmate, closest companion, and magical partner. Tianqing's direct offer of friendship helped Jiayu emerge from isolation; they eventually confirmed to each other that they were Hellcat and Heartmoon Fox. 9 19 210
• Nan Xiaofeng / Hyacinth — Her younger sister. Jiayu tutors, disciplines, and fiercely protects Xiaofeng, who considers Jia Yu family and admires her physical ability. 22 92 474
• Xia Taotao / Cheshire Rabbit — Fellow villain magical girl. Jiayu offers the inexperienced Taotao support and guidance in villain activities. 127
• Lin Muyao / Nightingale — A friend whose enormous magical reserves initially tempted Jiayu to use her for replenishment. Jiayu nevertheless joins Tianqing in visiting and supporting Muyao. 60 62
• Bai Li / Bai Lili — A former target from Jiayu's Shencheng days. Bai Li developed a deep fear of Hellcat after repeated magical draining; Jiayu later apologized and promised not to attack her again. 201
• Nan Jiayu's dormmates — Her unnamed roommates tease her over Tianqing, help prepare her for outings, and affectionately call her “Mama Little Fish” when she brings them breakfast. 47 113

Story Role / Major Arcs

Arrival in Rongcheng

Jiayu meets Su Tianqing during their first university class and accepts her invitation to lunch. Their early outings at Greenheart Park, the amusement park, and shopping districts begin changing Jiayu's formerly isolated life. 9 19 20 24

Hellcat's Secret

While growing close to Tianqing in civilian life, Jiayu separately works alongside Heartmoon Fox as Hellcat. She becomes increasingly troubled by concealing both her villain identity and her connection to Fox Fox from Tianqing. 37 70 78

Razor Monster Incident

When a Razor Monster attacks the college, Jiayu initially tries to flee with Tianqing rather than expose herself. Once they are trapped, she transforms into Hellcat to protect her, revealing the secret she had feared sharing. 154 155

Spike City and Redemption

In Spike City, Hellcat easily defeats a gorilla monster and later seeks out Bai Li to apologize for their history. During the Leviathan crisis, she sacrifices her Guardian Star fragment to access Shadow of the Stars and protect Heartmoon Fox. 192 201 208

Open Partnership

After the Spike City events, Jiayu and Tianqing openly confirm each other's magical identities. Their relationship grows increasingly domestic: Jiayu moves belongings into Tianqing's apartment, helps arrange sponsorship for Wang Xiaowang, and participates in Tianqing's plans, investigations, and training projects. 210 384 388 628 630

Trivia

• Jiayu dislikes overly sweet ice cream, unlike Su Tianqing. 37
• She watches Heartmoon Fox livestream replays and follows Fox Fox's content closely. 38
• She is a capable cook and often handles meals at home with Tianqing. 579 707
• Her classmates and friends frequently interpret her interactions with Tianqing as romantic, including when the pair wear matching couple outfits. 198 210