Cheeky

/ˈtʃiːki/

showing a lack of respect or politeness in a way that is amusing or appealing.

"a cheeky grin"

Playful
/ˈpleɪf(ʊ)l/ fond of games and amusement; light-hearted. "a...

Emotions Wheel
I have enjoyed working with the emotions I found in Plutchik, but there are so many more...