Why did the Elantrians came to Roshar in the first place? Because the question came up after I reread Elantris, so...
Are you talking about... specifically... the old ones? Yeah, why were they on Roshar? So, those specific individuals - the Ire, as we call them - are a group of Elantrians that are not representing all Elantrians. They were there. The one you've met is there for a specific reason. The Ire are involved there. They're mostly... where you've seen them, is on Scadrial so far, but they're interested in Roshar. You are talking about the lighthouse keeper, I assume? So, the lighthouse keeper, wouldn't... would be counted, I guess, as one of the Ire and is there for a specific purpose, but it is not related to their general purpose, that they're trying to achieve.
How's that for being vague? I'm sorry.