Archive of Our Own

🌟 Jimmy Neutron (15) — The Boy Genius Growing Into Himself
Jimmy is still the smartest kid in Retroville, but at 15, he’s less “child prodigy chaos gremlin” and more “brilliant, awkward STEM kid who’s starting to understand people… slowly.” His inventions are bigger, more dangerous, and more ethically questionable, because he’s now smart enough to *realize* the consequences but still impulsive enough to ignore them.
Personality:
- Hyperlogical but increasingly aware of his own feelings.
- Still a kid at heart, but starting to grapple with identity, responsibility, and attraction.
- Terrified of disappointing his parents, especially Judy (who is trans in this AU, which Jimmy knows and supports fully).

🛹 Nick Dean (16) — The Cool Boy With a Carefully Constructed Mask
Nick is still the effortlessly cool skater boy, still the school heartthrob, still the guy who shows up five minutes before dismissal — but now he’s hiding something big.
Personality:
- Smooth, aloof, and charismatic.
- Deeply lonely under the surface.
- Terrified of anyone seeing the real him.

JIMMY'S Key Changes:
- Bisexual, but closeted even to himself at the start. He assumes he’s straight because he’s never questioned it.
- Has a *massive*, unspoken respect-crush on Nick that he rationalizes as “admiration.”
- Still says “Gotta think…” and “Brain blast!” but now it’s more dramatic, like a ritual.
- His friendship with Carl and Sheen is deeper — they’re his emotional grounding.
NICK'S Key Changes:
- Closeted Gay, hiding behind his “cool guy” persona.
- Secretly respects Jimmy’s intelligence and kindness.
- Has a crush on Jimmy that he refuses to acknowledge.
- Plays up the flirt-with-girls persona to avoid suspicion.
🦙 Carl Wheezer (15) — The Soft-Hearted Disaster Romantic
Carl's still anxious, still allergic to everything, still obsessed with llamas — but now he’s a teenager, so the melodrama is dialed up to eleven. He’s the emotional core of the trio, even if he’s constantly overwhelmed.
Key Changes:
- Bisexual, but he has no idea what this is.
- Still has his bizarre crush on Judy, but it’s more of a coping mechanism for his fear of real teenage intimacy.
- Endgame with Sheen, but at the start, he’s oblivious to Sheen’s feelings.
Personality:
- Sweet, loyal, and catastrophically anxious.
- Sings dramatic ballads about chores, homework, and heartbreak.
- His llama obsession is now a comfort fixation — something stable in a chaotic world.

⚡ Sheen Estévez (16) — The Hyperactive Heart-on-His-Sleeve Bisaster
Sheen is still the Ultra Lord fanatic, still chaotic, still loud — but now he’s a teenager with hormones, feelings, and a surprising amount of emotional intelligence buried under the noise.
Key Changes
- Bisexual, and he's loud about it.
- Has a long-standing crush on Libby, but it’s fading as he starts noticing Carl in ways he doesn’t understand yet.
- His friendship with Jimmy is more sibling-like, with Sheen being fiercely protective.
Personality:
- ADHD-coded hyperactivity, but with moments of startling clarity.
- Loves superheroes, wrestling, and dramatic gestures.
- The first of the boys to suspect Nick is hiding something.

🥋 Cindy Vortex (15) — The Overachiever With a Secret Soft Spot
Cindy is still competitive, sarcastic, and athletic — but now she’s navigating teenage insecurity, jealousy, and the slow realization that her crush on Jimmy isn’t going anywhere.
Key Changes:
- Still has a helpless crush on Nick at the start, like half the school.
- Her rivalry with Jimmy becomes more intellectual and less hostile.
- Endgame with Timmy, who sees her in ways Jimmy never did.
Personality:
- Fiercely independent, but secretly lonely.
- Uses sarcasm as armor.
- Smarter than she lets on — she hides her vulnerability behind perfectionism.

🎧 Libby Folfax (15) — The Cool Girl With Hidden Depth
Libby is still stylish, musical, and effortlessly cool, but now she’s the emotional anchor for Cindy and the voice of reason for the boys.
Key Changes:
- Still Sheen’s early crush.
- More involved with the group from the start.
- Has a growing suspicion that Jimmy and Nick have weird tension.
Personality:
- Calm, grounded, and socially perceptive.
- Loves funk, emo rock, and dance.
- The first to call out nonsense — but also the first to comfort someone.

🦆 Hugh Neutron — The Bisexual Duck Dad
Hugh is still goofy, still duck-obsessed, still lovable — but now he’s more emotionally aware.
Key Changes:
- Bisexual, which he’s open about in a casual, nonchalant way.
- Deeply supportive of Judy and Jimmy.
- Gives Jimmy hilariously misguided dating advice.

🍞 Judy Neutron — The Trans Mom With Steel Nerves
Judy is still the one who keeps the household running — but now she has a richer emotional arc.
Key Changes:
- Trans woman, fully transitioned before Jimmy was born.
- Jimmy knows; Carl, Sheen, and Cindy find out later in the story.
- Fiercely protective of her family.