Drax is an android.
Drax became friends with Mentor. The two then sought a library with all knowledge of the universe. While on the way, they encountered Silver Surfer and Pip the Troll. However, those who sought the library became slug-like creatures, including Mentor and Silver Surfer. Surfer returned to normal and he, Drax, and Pip left. Pip then decided to travel with Drax.
The two were together when Thanos reversed time.