"Caras" or nicknames can be like special names that people call each other to show that they are close. It's like when your mom or dad calls you "sweetie" or "honey" instead of your real name. It's a way to make each other feel special and loved.
When someone has a long name, like Katherine, sometimes their friends might call them "Kat" for short. That's a nickname! It's a way to make it easier to say their name and it can feel more friendly too.
Some nicknames are based on how a person looks or acts. For example, if someone is really tall, their friends might call them "Biggie" or if someone is always laughing, their friends might call them "Giggles". These names can make people feel happy and bring everyone closer together.
Having a nickname can be a fun way to make someone feel special. It's like a secret name that only a few people know and it's a way to show that you care about them. Just remember to always ask if it's okay to call someone by their nickname, because not everyone likes it.