She could be hiding to surprise someone or to avoid getting caught doing something naughty. There are many possible reasons.
Maybe she's playing a game or is scared of something.
Maybe she's playing a game or she's scared of something.
Maybe she's scared or playing a game of hide-and-seek.
The reason might be that she's found a secret treasure in the box and is hiding to protect it, or she's simply following her imagination and having fun.
The girl might be hiding from the other girl because she's afraid of being bullied or because she has a secret she doesn't want the other girl to know.
Perhaps she's seeking a quiet and safe space. Maybe she's avoiding someone or something that makes her uncomfortable. Another possibility is that it's part of a fun imagination or story in the cartoon.
Well, perhaps the gift is for someone she's not ready to show it to yet. Or it could be part of a game or challenge where hiding it is the task.
Maybe she's playing a game of hide-and-seek or she's scared of something.
Maybe she's scared or shy. Sometimes kids hide behind their parents for protection or when they feel uncomfortable.
Maybe she's meeting new people and feels nervous. Or perhaps she had a bad experience before and is now cautious.
Maybe it's scared of something or trying to play a hide-and-seek game.