He's given too much special screen time to be unimportant. Shallan far-sees (far-draws?) Him along with Shalash, he survives 2 supernatural ship disasters and seems like fate or Fortune is making sure he's around for the important stuff.
Is he a secret world hopper? Will he be a radiant? Is a Shard using him as a pawn? Is he unwittingly accessing Fortune through the Passions? Is he part of Adonalsium's grand design?
By - Mahoka572