The manga girl might be scared because of a sudden loud noise or an unexpected appearance of a scary character. Or perhaps she has a phobia that's been triggered.
Maybe it's because her expression and situation touch people's hearts and make them relate.
Maybe she saw something spooky or had a bad dream.
Maybe there's a scary monster or a creepy scene that frightened her.
Maybe there's a creepy monster or a sudden loud noise that frightened her.
Maybe she saw something creepy or had a bad dream.
Maybe she saw something creepy or had a bad dream.
Maybe she saw something creepy. That could be a monster or a spooky place.
It could be that she's in a strange place all by herself and that makes her scared. Or perhaps she heard a loud noise that frightened her.
Maybe she had a bad dream or heard a strange noise.
Maybe she saw something really scary, like a monster or a creepy shadow.