Mr. Knight

Mr. Knight was orignially a joke character, but managed to become a supporting character recently.

He was brought into Hell by Scorpion, for no apparent reason.

 DEMONS FROM THE 7TH LAYER 

After deciding that he needs to be more powerful to keep up with his peers, he decided to go to the 7th layer of Hell to gain cores, with full knowledge of the dangers there. He met Bushman, the dangerous war criminal, but after a tough fight, killed him. After he got his core, he was stabbed in the stomach by the Moon Knight. He was in recovery for a week or two, but gained superhuman strength and speed.