[mouth]:are their lips always drawn thin or are they plump and kissable, what's their "default expression"/resting face, do they have all their own teeth, do they use their teeth to smile, etc.
Danny has a very expressive mouth. His lips are neither overly plump, or extremely thin, but really of an average size. When he’s happy and relaxed, they usually have an upward quirk at the corners, a perpetual smirk on his lips.
When he’s sad and upset, the corners tilt down into tiny frowns that thin his lips that he tends to try and hide.
His smiles vary by intensity, to small, closed mouthed tender smiles, to big grins and toothy laughs when he’s feeling playful or really really happy. Likewise, when he’s very frustrated and angry, he’s prone to baring his teeth in an almost feral snarl.