Real Name: X-4
Current Group Affiliation: None
Former Group Affiliation: None
1st Appearance: CAPTAIN AMERICA(v.1)#127 (1970)
Known Superhuman Powers: Android X-4 was powered by radiation and could go 24 hours straight without tiring. He also had superhuman durability, reflexes, and strength.
Other Aliases: None
Arch-Enemies: Captain America, Iron Man