probably need a slight explanation story wise but it should be fine

short story: in the abyss the monster inside Milo created a spectra of the angel Itaris. which it used to torment him. before it was defeated it tried to create the spectre into living flesh which it succeeded but before it could upload its consciousness into it the monster was killed leaving only the spectre behind. we brought it back to our world and now it's soul grows as well as its curiosity.

but it looks like her curiosity is going to get her bitten