Ridley

Ridley was many of the Alien friends Nemesis made on his journeys through the cosmos; he was also a member of Nemmy's team of Aliens, often called the Peacemakers.

A Forged Friendship:
Nemesis caught Ridley being shipped away to a galactic slaughterhouse by interstellar smugglers (many Reptilidactyls are famous for their succulent meat). After freeing Ridley, Nemesis (then known as Copperhead) discovered and destroyed the smuggling operation; Ridley then joined him (Copperhead) on the intergalactic journey, also meeting up with Reactor, Clockwork, and Venus along the way.

The Ultimate Sacrifice:
During a hard and bloody battle with the Phoenix Five, Copperhead was mortally (and viciously) wounded by Emma Frost. Deciding to save him by giving their lives and powers to him (since he saved each of their lives), Ridley, Clockwork, and Reactor gave up themselves to revive the shattered Copperhead, who was reborn as Nemesis.