Well, in some tellings of the story, the little girl is polite to the wolf at the start. However, as the wolf starts to act more menacingly, her reaction changes to fear and a desperate attempt to save herself. For example, she might try to run away or call for help. This shows how her initial reaction of perhaps kindness or naivete turns into a fight - or - flight response as she realizes the true nature of the wolf.
She could be curious at first. But as the wolf shows its true intentions, she might become scared. In many versions, the girl is caught off guard by the wolf's sly behavior and has to figure out how to escape or get help.
She might be initially naive and friendly. Maybe she doesn't realize the danger right away.
In certain stories, the girl might see the merman as a magical being and immediately feel a sense of wonder. She could be in awe of his beauty and grace in the water, and be eager to communicate with him, regardless of the potential risks.
She could be startled at first. A snake is not a common sight for a little girl. But then her reaction might change depending on how the snake behaves. If the snake is still, she might get closer out of curiosity. If it moves suddenly, she might get scared and run away.
The wolf behaves very cunningly. It tries to deceive the little girl by pretending to be friendly at first.
She might be nervous. Katniss is used to being on her own and not having much family interaction. Meeting Peeta's family could be intimidating for her. She may be quiet at first, observing them carefully.
She might be shocked at first. After all, she has no idea that Chat Noir has a kwami. But then she would probably be curious and start asking Plagg all kinds of questions.
She could try to communicate her feelings. Just tell him that she noticed and it made her a bit uncomfortable.
She probably feels excited. Discovering the tooth fairy is like finding out about a wonderful secret world. It's something new and magical, so she would be filled with anticipation and joy.
Anakin might be shocked at first. After all, he may not have expected to ever meet his father. He could be hesitant and full of questions.
Izuku might be shocked at first. After all, he has grown up without his father. But then he could be filled with a mix of emotions like joy, confusion, and anger all at once.
He might be shocked at first. After all, he has probably only heard stories about his father. Then he could be angry, blaming his father for not being around when he was growing up.