Red Death

PERSONALITY: impulsive, hyperactive and cheerful, he is also very intelligent

ABILITIES: Time travel, running much faster than light, and corrupting timelines and rewriting existences

Reverse-Flash/Eobard Thawne:

PERSONALITY: Sociopathic genius, obsessive and sadistic, everything against Flash/Barry Allen, he is also very intelligent

APPEARANCE: Suit: Bright yellow with red details, featuring a lightning bolt symbol inside a white circle. His boots and gloves are red.
Mask: It covers his head leaving his face visible, but his eyes are often shown as red or completely black and gloomy to reflect his evil.

ABILITIES: Time travel, the ability to alter timelines, and the ability to run faster than the speed of light thanks to the Negative Speed ​​Force

Flash/Barry Allen:

PERSONALITY: Analytical Scientist: As a forensic investigator, he uses science and physics to solve problems and apply his powers creatively.
Optimism and hope: He is considered the heart of the Justice League, representing hope and kindness even in the face of their enemies.
Sense of humor and awkwardness: He is a little shy, socially awkward and prone to making jokes.

APPEARANCE: Base color: Bright red, made with flexible fabric.
Central emblem: A yellow or gold lightning bolt framed within a white circle on the chest.
Belt: Thin and gold, often with a pointed lightning bolt design surrounding it.
Mask (cowl): Completely covers the neck and head, leaving only the mouth and nose exposed. It has two small yellow wings or rays on the sides, at ear level.
Hand and foot accessories: Yellow boots and gloves.

ABILITIES: Time travel, attacking with the Speed ​​Force, and running faster than light (13 trillion times faster than light or more)

Wally West:

APPEARANCE: Main differences with Barry: The shade of red is darker (closer to cherry or brown) and the belt symbol ends in a point instead of being flat.
Uncovered hair: Unlike Barry, his mask leaves much of his hair exposed, giving him a more dynamic look.

Super speed and reflexes: He can run at superhuman speeds, move so fast that he becomes invisible, and manipulate his energy to generate lightning.
Solid Energy Constructions: Create structures based on Speed ​​Force energy bats.
Aging and dissolution effect: Upon contact with objects, their constructions or silhouettes can cause massive damage or accelerate aging.
Superhuman intelligence: Combines Batman's brilliant intellect with the brain processing speed of a speedster, allowing him to think at immense speed.
Improved resistance: It withstands severe impacts and has an aura that protects it from friction at high speeds.

Obsessive and ruthless: She is driven by the trauma of not being able to save her allies (like the Robins).
Unstable and corrupted: By merging with the Speed ​​Force and Barry Allen's mind, Bruce Wayne loses his sanity, acting with extreme cruelty to eliminate his enemies and subdue his world.

Also, since he's merging with Batman/Bruce Wayne, he's very intelligent, able to create tactical attacks, traps, or other ingenious things.

chest
In the center of his chest is a huge red emblem in the shape of a bat fused with a lightning bolt. This symbol usually emits intense red energy, as if the suit were constantly overloaded with dimensional speed.
Arms and gloves
The arms have blades, mechanical ridges, and lightning bolt markings. When he runs, red electrical discharges similar to those of corrupt DC speedsters appear around the gloves.
Legs and boots
The boots are heavy and armored, more like Batman's than Flash's. The red lines continue down his legs and glow even brighter when he accelerates.