Oddly enough, Keldorn Firecam does not fit the appropriate superior for Ajantis, as Ajantis is a follower of Helm whereas Keldorn a follower of Torm.
As the only NPC Paladin in the game, Ajantis is a good fighter with decent healing abilities. He has been sent by his superior Keldorn Firecam (a playable NPC in the sequel) to investigate and wipe out the bandits currently plaguing the Sword Coast. The NPCs are categorized by general alignment.