Thanos

Thanos is the main antagonist of the Marvel Cinematic Universe and adoptive father to Nebula and Gamora.

Biography
Thanos is a evil Warlord who murdered the Zehoberein race. when murdering the planet he came across Gamora, who he took under his wing. he made Gamora and Nebula fight each-other in battle, Gamora always winning, he kept replacing a part of Nebula's body. Gamora was his favourite, seen as she always didn't lose. Later in life he raised Gamora and Nebula as his personal assassins.