Meliodas

Meliodas, Captain of the Eight Deadly Sins, is Ayden's first long-term lover, and is the Earth-091991 counterpart of Carlos Cordell. He is the first Doppelgänger of Meliodas Bearáin, and the firstborn as part of another species. He is a demon.

Biography
Not much is ever revealed about Meliodas' past, aside from the fact that he was born into a considerably royal family of demons, his father being the king of all demons.

It was revealed that around 3000 before the Mesopotamian Era ended, Meliodas had betrayed his former clan after having fallen in love with a goddess named Carmel and choosing her over them, abandoning his title as leader of the Ten Commandments as well as his commandment, officially betraying them in the process, as well as fleeing and killing two of the Ten Commandments, Aranak and Zeno, during his escape.

Meliodas and Carmel were each to be killed by their respective clans as a result to their defiance but ended up being cursed instead, Meliodas imprecated with eternal life for the sin of taking the hand of one of the Goddess Clan, and betraying and killing his comrades.

As the centuries went by, Meliodas came upon three reincarnations of his lost love and discovered how much deeper his curse ran after attempting to help the reincarnated goddess recover her memories, only to lose each one of them to death upon recalling their past life. It wasn't until he personally met Ayden, was the curse severed, the latter being Carmel's progenitor.

Powers
He might have the ability to reincarnate into new forms and identities over the centuries. However, his future forms can not apparently recall their past.

Abilities
Bucky was surprisingly skilled in unarmed combat. He was strong and agile. He was able to evade the attacks of an armed opponent, to beat him up with his bare fists, and to disarm him. Emil Natas compared Bucky to "a little wildcat".

He was also an experienced horse rider.

Strength level
Probably average human strength or slightly above average. He seemed to be a normal human, though athletic and muscular.