Fearofdolls (Fearof___, where ___ is another noun. Or verb. )
Fearandsadness
I'd suggest just playing around with adding different words/phrases to 'Fear' or 'Sad' and seeing what works for you. An aesthetic username is a bit subjective (meaning that not everyone will look at a username and think it's aesthetic . . . it's really just up to you to decide if it's aesthetic or not).
