Mentor shared a similar history to his Earth-616 counterpart. Tony Stark discussed how he was introduced in Iron Man #55 alongside other Titanian Eternals. Search this site for: A'Lars (Earth-77640).
Mentor assisted Elysis and Captain Marvel in the construction of the ship containing the Omni Wave Transmitter on there quest to halt the Kree-Skrull War and was able to hear the ultimatium Mar-Vell sent to both empires. Later when Doctor Strange and Silver Surfer arrived on Titan to find Mar-Vell, Mentor was nursing a sick Eros who had fallen ill to infectious condition caused by saving Mar-Vell's life.
