celesta

cello

glockenspiel

music box

string

synthesizer

toy piano

violin

synth

anxious

apprehensive

atmospheric

creepy

dark

doubtful

evil

haunting

march

menacing

oppressed

quiet

regretful

restless

scared

scary

somber

terror

tragic

vengeful

halloween

macabre

ghastly

ghostly

spookish

melancholy

sad

obscure

depressive

tenebrous

monster

beast

demon

freak

horror

supernatural

vampire

video game

nightmare

nightmarish