"Well usually it's through magic something or other. Some dark magic spell or... magical keys that bring down the walls between worlds and realities." She was just going to leave that there since Dawn was said key, created to bring chaos to the world. That was probably too much for Porthos to digest right now, to know that she wasn't entirely real.

"It's... I mean there's never a dull moment. But I bet your life is like that too. Same shenanigans, different monsters." Monsters being people. Because people could be just as bad as the big bads they sometimes fought in their world.