Revenant

Revenant is an assassin robot.

Origin
Revenant is an assassin robot designed by the malevolent corporate conglomerate Ikair Robotics. He's what's known as a Sim, a robot bound to their creator's will and is resurrected (albeit in a new, but physically identical, body) when they die. He has proven to be quite efficient, even claiming a Hero's life. This Hero would be Echo, although in a turn of events, Zib placed a new Hero Core into Echo's body, spawning a Hero referred to as Echo V2. Revenant would find himself fending off attempts on his life by Echo V2 as a form of vengeance for his past self's demise.

Worlds Collide
Revenant would fight the Omega Team when Heroes from other dimensions such as Medyx and BrusR would show up. This turn of events forced the assassin to flee. Since then, Revenant would be redeemed and granted amnesty for his past actions, but still retains resentment from Echo V2.

Trivia

 * Revenant is inspired by the Apex Legend of the same name.
 * Revenant was salvaged from an idea for a character named Proto, who's name would later go on to form the Hero Proto.
 * A Reddit post from the creator of Revenant reveals what Proto would've been like, along with early concepts for the first iteration of Echo.