Problems Referencing Character in other levels?

Hey, I am trying to reference a character in my sub-level blueprint so that when I hit a trigger box in the second level (which has been loaded when the character hits a different trigger box) but in the blueprints, I cannot seem to reference the character even when I click it and then right click to reference. I have 2 levels, one is the standard one, and the other one is a loaded level when it steps into an area to get the level up.

You can’t reference an actor from a level that will not be loaded by default.
You need to “find” the actor and then reference it AFTER the level is actually loaded.

And how would I do that?