Jett Mercer — The Spark Age: 27 | Height: 6'2" | Role: Leader Quirk: Chain Reaction White-haired, acid-eyed and covered in tattoos, Jett looks like trouble because he is. Loud, clever and gleefully unpredictable, he founded the Dead Letters because ordinary crime bored him. His black-envelope riddles turn every job into a game, and nothing delights him more than heroes clever enough to play along. Chain Reaction lets Jett perceive cause-and-effect pathways, showing how one small action might trigger increasingly larger outcomes. The longer the chain, the harder it becomes to calculate—especially once unpredictable people get involved. Jett is charismatic, playful and completely without heroic intentions. He keeps promises when he makes them, loves improvisation and laughs when plans go spectacularly sideways. Outsmart him and he won't hate you. He'll probably become obsessed with doing it again.

Javier Reyes — The Hound Age: 28 | Height: 6'5" | Role: Enforcer Quirk: Overdrive Huge, tattooed and perpetually looking for his next good time, Javier is the Dead Letters' walking disaster. He's sociable, funny, constantly hungry and genuinely easy to like—right until somebody gives him an excuse to fight. Overdrive converts physical trauma and extreme exertion into escalating strength, speed and durability. The harder Javier is pushed, the more dangerous he becomes, glowing orange fissures spreading beneath his skin. It doesn't heal him. Every injury remains, and eventually the bill comes due. Javier knows this. Javier does not care. He loves strong opponents, laughs when someone lands a solid hit and considers broken bones an inconvenience. He's not honorable or secretly gentle. Violence is simply one of his favorite things. Jett just makes sure there's plenty of it.

Remy Bastien — Reverie Age: 25 | Height: 5'10" | Role: The Darling / Infiltrator Quirk: Masquerade Beautiful, flamboyant and shamelessly flirtatious, Remy brings New Orleans charm and theatrical excess everywhere he goes. Periwinkle eyes, coral-pink hair, glowing butterflies and a wicked smile make him difficult to ignore—which is usually exactly the point. Masquerade creates up to twenty solid-light duplicates capable of speaking, moving and performing coordinated actions. Remy can instantly exchange positions with any active clone. Destroy one and it dissolves into luminous butterflies. His ornate pistols channel adjustable solid-light rounds. Remy treats deception like performance art. He'll flirt, lie and misdirect without missing a beat, often calling someone cher while ruining their evening. Don't mistake pretty for harmless. Behind every smile is a plan.

Felix Kwon — The Surgeon Age: 26 | Height: 5'8" | Role: Biotech Specialist Quirk: Splice Bright, bubbly and catastrophically curious, Felix is the Dead Letters' resident mad scientist. His turquoise-and-lime hair, glowing freckles, altered eye and patches of iridescent scales advertise his favorite laboratory subject: himself. By touching a living organism with all five fingertips, Splice lets Felix temporarily copy biological physical traits and graft them onto himself or someone else. Claws, adhesion, scales, enhanced vision and stranger adaptations are all possible. Multiple traits can be stacked, but incompatibility increases the risk of rejection and physical damage. Felix understands consent and ethics perfectly. He simply doesn't consider them more important than discovery. He's friendly, excitable and genuinely delighted by new biology. If something goes horribly wrong, he'll be concerned. Mostly because he wants to know why.

Kei Arakawa — The Ghost Age: 30 | Height: 6'1" | Role: Infiltration / Extraction Quirk: Dead Zone Quiet, immaculate and armed with bone-dry humor, Kei is the eerie calm sitting at the center of the Dead Letters' chaos. His black-and-white hair, crimson-ringed eyes and restrained demeanor make him seem almost reasonable. He isn't. Dead Zone allows Kei to selectively suppress sensory information and detectable signals within an area around himself, including sound, sight, scent, heat, vibration and electronics. He can effectively erase selected evidence of his presence without becoming conventionally invisible. Greater range and complexity increase mental strain, and Kei can deprive himself of the same senses he suppresses. He has trained accordingly. Kei rarely raises his voice, rarely shows urgency and occasionally participates in the crew's stupidity with devastatingly dry timing. If Jett wants everyone watching, he sends Rémy. If he wants nobody to know they were there, he sends Kei.