Most of my characters are from fantasy worlds, so they'd probably be as freaked out as I would be. Especially the characters from Outcast Kingdom.
Hilda or Ivan, I'd hide from them, because I know they don't like humans, and they'd probably need some time to themselves after finding themselves here.
Gunther, I'd just freak out (because obviously)
Olwyn would probably be really confused and scared, so I'd try to talk to and help comfort her.
The characters from Hero's Dilemma wouldn't be as culture-shocked, so would be more approachable.
Paragon, I'd be all like "Paragon! Oh my god this is the coolest thing ever!" And I'd start planning how we could save the world.
Sycorax, My reaction would be more submissive, trying to win favor in order to not get on her bad side.