Once, Thor probably would have been distressed about having to keep track of multiple Lokis, paranoid of way too many knives and way too many grudges that might end up biting him in the back at any given moment. Whether they've all grown past that point or maybe Thor's just given himself over to the weirdness that is his life, is anyone's guess. Either way, the end result is the same, in that he's probably not nearly as worried about this as he should be.

"Of course I have." He tries not to make it sound too much like he thinks that's a silly question. "Without access to the Bifrost, it'd be hard to explain my absence from the ship otherwise. He laughed heartily when I told him I'd met two more of him." Norns forbid all three of them ever join forces together. One trickster alone is plenty, and when all three are Loki, well, Thor pities whatever target they choose to harass.