Gajeel very rarely smiles and he only smiles for the following reasons/people
Levy- all the time or when talking about her
Wendy- all the time
Juvia- when they are alone. He would never admit they are best friends
When any of the ‘idiots in the guild’ get hurt
When he hears Gray say he doesn’t Like juvia (that gets a huge laugh followed by a threat)
Whenever he beats someone up
Those are the reasons gajeel smiles













