It could be a custom Aesthetic (like a mix). Not everything thats mixed up or different isn't labelled an aesthetic. That's a custom aesthetic or a mix; and you can give it a name if you want and explore that with other people who might have the same as you. The pink, cute, soft, fluffy half is kawaii or pastel; plague doctors, blood and gore..demons and angels and polaroid pictures. I wouldnt know the name for it, but like I said, it could be a mix or a custom aesthetic.

Kawaii, Yami kawaii, gorecore, plaguecore, Angelcore, devilcore, vintage.

Menhera sounds like a perfect description of your aesthetic- its a j-fashion that really ties into everything you said you should check it out

Traumacore or yamikawaii