The cartoon girl might be scared to open the door because she saw something creepy earlier near the room or heard someone telling a scary story about it.
Maybe there are some strange noises coming from inside the room that scare her.
Maybe the boyfriend did something unexpected or threatening that scared the girl.
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. That could be a monster or a spooky place.
Maybe she saw something creepy or had a bad dream.
Maybe she's about to speak or express something.
The eyes being open in the dark and the character being scared could be due to a sudden noise or an unknown presence that makes them feel uneasy. It's a common way to show fear in cartoons.
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.