A-Trian|Cheetah version

He shows his affection by:
Purring and soft vocalizations, continuous body rubbing, rubbing of head and cheeks, licking.

Equipment
Superhero Suit: Like most superheroes, A-Train has his own suit. This suit is strong enough to withstand the immense force A-Train generates when moving at supersonic speeds. After rejoining The Seven, A-Train modified his uniform to reinvent himself as an African symbol. However, he eventually returned to his old uniform after receiving a heart transplant.
Protective goggles: A-Train wears protective goggles to shield his eyes when moving at high speeds. Although he apparently doesn't always need to wear them when running.

Weaknesses:
Calorie Consumption: Because he moves at supersonic speeds, A-Train needs to consume a large number of calories to have enough energy to perform such feats. While it's stated that A-Train needs 3,000 calories per hour and 30,000 calories per day to perform at his peak, Homelander says this only happens when he uses his powers regularly. If A-Train isn't running, he'll simply gain weight by consuming large quantities of food.
Superhuman Boost: If he goes too fast, A-Train cannot stop or change direction suddenly. He had trouble controlling himself when, crashing into Robin Ward, Hughie's girlfriend, he accidentally killed her, leaving her covered in blood, and accidentally swallowed one of her teeth. When dodging a woman, he lost accuracy.
Brute Strength/Limited Durability: While his strength and durability are still greater than those of a human, A-Train is still vulnerable to super strength, as seen when Kimiko was able to break his leg quite easily, as well as when Homelander broke his neck.
Limited movement: A-Train needs both legs intact. If either leg is disabled, he becomes completely helpless and cannot move at super speed.
High frequencies: Because he is a Super, A-Train is susceptible to high frequencies. When a high frequency is played, it can cause him immense pain and temporarily incapacitate him.

Powers and abilities
A-Train possesses extreme super speed (exceeding 1,000 km/h, creating sonic waves, and perceiving the world in slow motion). His powers include superhuman reflexes, stamina, an accelerated metabolism (requiring thousands of calories a day), superhuman strength and durability, and a regenerative healing factor (enhanced by Compound V). He can silently run at high speeds and use his momentum for lethal impacts. Weaknesses: inability to stop abruptly (caused Robin's death), heart problems due to Compound V abuse (temporarily resolved with a heart transplant), and vulnerability to leg injuries or high frequencies
It also has the ability to purr loudly (although it is involuntary); its purrs convey calm, contentment, and consolidate peace.

History:
Childhood and early years
Reggie Franklin grew up in a low-income household. Shortly after his birth, his parents accepted Vought International's offer to inject him with Compound V, turning him into a super (supe). His father died when he was very young, and his mother worked two jobs, so his older brother, Nathan, raised him and became his personal trainer. Reggie's super speed was activated at age three when he outran bullets during a shooting at his home. This made him a celebrity for Vought, who promoted him as A-Train, the fastest man alive. He attended Godolkin University, where he was the top-ranked student under the tutelage of Richard Brinkerhoff, and graduated in 2015. Before joining The Seven, he was a member of the Teenage Kix youth team, where he began a relationship with Popclaw.
Entry into The Seven
In 2015, A-Train was recruited for The Seven as Mister Marathon's replacement. Initially motivated by a desire to help people and support his family, he soon became addicted to fame, wealth, and publicity. He abused Compound V to maintain his status as the fastest superstar, which caused him serious health problems.

A-Train is more focused on his career as a member of The Seven and maintaining his title as the Fastest Man Alive. Popclaw, meanwhile, grows frustrated by A-Train's repeated refusal to publicly acknowledge their relationship, instead pretending to be single and available. Things escalate when she is blackmailed into revealing information about Compound V, and A-Train is "forced" to kill her to secure his position in The Seven. While A-Train feels some remorse over her death, he ultimately blames Hughie for "forcing" him to make that decision.
A-Train is determined to maintain his status as the fastest man alive. To that end, he uses the drug Compound V to further enhance his powers. This leads to his downfall, as he later suffers a heart attack, which ultimately results in his expulsion from The Seven. However, the continued use of Compound V

Personality:
A-Train is a complex individual with many internal conflicts. Initially, like most "superheroes," A-Train is greedy, egocentric, and selfish, more interested in fame, fortune, and publicity than in helping others. In fact, he displays ruthless cruelty, possibly to the point of sociopathy. It is also hinted during a conversation with Starlight about the potential loss of The Seven's financial assets that A-Train's obsession with maintaining his wealth and celebrity status may stem from his humble upbringing and that he measures his self-worth by his lavish lifestyle as a Vought-owned superhero.
Initially, Reggie wanted to do good in the world, but under Vought's influence and unimaginable pressure, it corrupted him to the core, sacrificing his integrity and his own survival. In his first appearance, he was shown to be extremely careless. He kills Robin Ward by running her over, albeit accidentally, while she was at Compound V. Furthermore, throughout the series, there are hints that he had caused similar incidents before. Not only did he show no remorse for an accident that should have been traumatic, but he demonstrated incredible callousness when he later joked about the incident with another "Supe," laughing at Robin's death. While he personally apologizes to Hughie for killing Robin, he does so only because Vought forces him to as a concession to Hughie Campbell, who wouldn't sign Vought's nondisclosure agreement unless A-Train apologized. A-Train's indifference to the incident is further made clear by the fact that he is unable to recognize Hughie, even after being shown a picture of him or when he encountered him outside Popclaw's apartment.
The only person A-Train seemingly cares about is his ex-girlfriend, Popclaw; however, their relationship was strained because AT

Alias:
A-Train
Gender:
Male
Species:
Super
Coat color:
Brown

Appearance:
Feline and Physical Characteristics
Species: Anthropomorphic cheetah with an athletic and muscular build.
Coat and Spots: It has a greenish-brown/light brown coat with rosettes and black spots characteristic of these felines, distributed over the head, arms and tail.
Head and Face:
It has rounded ears with black edges and a pink/white interior.
Well-defined white whiskers on the sides of the snout.
White snout with a dark nose.
Limbs and Tail:
Tail: Long, feline, spotted and with a white/light tip.
Paws/Hands: Large feline claws with pink pads (toe beans) on the palm.
2. Superhero Clothing and Costume
The character wears an adapted version of A-Train's iconic suit:
Glasses: Dark tactical sunglasses/protective lenses with an aerodynamic sport design.
Main Costume:
A tight-fitting sprinter's jumpsuit that combines navy blue, light blue and white details.
It has protective panels on the chest and abdomen.
Shoulder Pads and Emblem: Circular dark blue shoulder pads with a large light blue letter "A", the distinctive A-Train logo.
Sleeves and Gloves: Athletic cut suit that leaves his stained arms exposed, complemented by dark fingerless gloves that expose his claws and pads.