Character Name: Nathaniel Essex
Nicknames: Essex, Mr Sinister
Codename: Sinister
Gender: Male
Age: Unknown, well over a hundred years old
Character Type: Mutant
Allegiance: Apocalypse

Physical Description:

Social Description: Oldest and most trusted Horseman of Apocalypse, Creater of Overseer of the Breeding Pens
Personality Description: Sinister is a sadistic manipulator

Power Level: Sinister is an alpha-class mutant.
Mutant Abilities:
Cellular Shapeshifting: ability to control every molecule of his body, allowing him to assume the form of any one he wishes. He once reduced himself into a semi-liquid state.
- Regenerative Healing Factor: Mister Sinister is able to rapidly regenerate damaged or destroyed tissue with much greater speed and efficiency than an ordinary human. Sinister can fully heal from injuries that result in massive tissue damage or loss such as multiple gunshot wounds, slashes, puncture wounds, broken bones, and severe burns within a matter of moments.

Superhuman Stamina: Mister Sinister's muscles produce considerably less fatigue toxins than the muscles of ordinary humans. He can exert himself at peak capacity for about 24 hours before fatigue begins to affect him.

Superhuman Strength: possesses superhuman strength, which may be a product of his shapeshifting. Sinister is able to lift/press about 10 tons.

Superhuman Reflexes: Mister Sinister's reflexes are enhanced to levels that are beyond the human body's natural limits.

Telepathy: He can read minds and project his own thoughts into the minds of others within a radius of 250 miles (on Earth). With extreme effort he can greatly extend that radius.
- Mental Paralysis: ability to induce temporary mental or physical paralysis
- Mind Control: capable of controlling the minds of others but only one at a time and if the target is in his physical presence.
- Dilate Power: ability to mentally paralyze a foe he's touching and the ability to psionically "turn off" the superpowers of any mutant.

Telekinesis: possesses telekinetic abilities enabling him to levitate and manipulate living beings, inanimate objects, and to some extent energy, psionically. He can lift as much as 10 tons of weight and possibly even more and can enable himself to fly at great speed.

Concussive Blasts: can fire blasts of concussive force from his hands.
Power Limitations: Sinister could sustain enough damage in a short amount of time that he would not be able to heal himself fast enough.

Character History:
Nathaniel Essex, a brilliant scientist and geneticist, was one of the first men in the world to discover the mutant gene. He made it his life's work to create the perfect mutant. This work led him to be contacted by Apocalypse. Sinister was the first mutant En Sabah Nur brought into his fold and was his first and best Horseman. Sinister was at Apocalypse's side when they witnessed the battle that killed Charles Xavier. It was the same day Apocalypse declared his war on humankind.