If your MC could say one thing to the person closest to them, what would it be?
That depends on if we're talking about the person my MC is closest to in her own world, or the person she's closest to in the world she gets transported to.
If it's the person she's closest to in her own world, it would probably be her little sister and she would say, "I love you and I'm proud of you," one last time because she doesn't know if she'll ever get back to her own world to say that again.
The person she's closest to in the world she gets transported to is the woman who takes her in when she first arrives on the scene. I think MC would simply tell her "Thank you," because the woman understood her situation and was kind and generous to MC when no one else was.
If your MC came face to face with a dangerous mythological creature that they used to think didn't exist, how would they react? Would they fight it? Run from it? Cry? Something else?