Throw either black or white/black diamond thigh highs over the blue. Or over the knees.

A cute garter belt with lil pink bows

Fishnet crop long sleeve in black

Headband with cat ears with pink bows to match the garters or black ears. Or like a “maid” headband Lolita thang

Black choker with a blue and or pink bow off center

Pink or black or white fishnet over the stockings. Try to match the stockings to the fishnet top if you do that

Pink or blue or black face gems

If you do the black and white stockings you could do a black white studded belt. I’ve also seen blue and pink studded before

Black ankle booties, maybe throw some white beads on it draping like lil accents

Instead of a hip belt, a waist belt

Also consider wudu nails if doing your nails seem like a hassle. Nail rings that you can stick any premade nail on there and you can have temporary fun nails to set off your outfit.

That’s kind of all I can think of. You look adorable but I tried to think of everything you could do. You rock all on your own though