Naruto can sense your aura.

[EL3RD]

This is a manga series adapted into Anime. It's the same thing as a superhero in the comics - tv shows etc. The creator gives them their abilities - powers. In the Naruto series though the majority of the characters have this unique trait of being able to sense "aura - killing intent ..size of chakra" etc. They are ninjas too and ninjas also have this type of ability. To me though the it looks more like its one of the powers of the characters.