Princess Octavia's from YouTube's Helluva Boss and this screenshot's taken from Valve's Garry's Mod.

Alternate Universe - She's from her home alternate universe.
Autism - She's born with one.
Cute Owl - She would like to do cute stuff, like booping someone's noses and cuddling her sister-figure, Loona, and her father, Prince Stolas.
Nice Gal - She wouldn't cause any trouble. She would prefer to be a demon of honor, after all.