Gith Summoner from another plane
Karath is a student of the Arcane. He’s studied at the [insert name of arcane study place here] with the Eladrin. The Prime Material plane is the starting point for Karath’s early trials as an Summoner Arcanist.
Karath specializes in creatures; natural, undead, summoned, other-worldly, abyssal, planar, magical, exciting, and even boring. His knowledge and resources are constantly increasing.
His social skills are a bit lacking, especially on this plane. The Githyanki have always been a war-like race. The Eladrin influence has helped the Githyanki to see the futility in their division. Karath seeks to reunite the Githyanki and Githzerai back in to one common Gith race.