Smelly is a girl. Her real name is not Smelly (thank god). apparently Tam-Chi created the name. No, she is not smelly. She is a nice girl who you can talk to when you need to talk to someone. 

If her life was a game, her 7 Jeopardy Categories would be:

Charming
Cute
Nice
Intelligent
Not gullible
Hates Leo (thank god, someone that doesn't like him)
Does not smell