>>159092
>Lamia + Vampire
That's already a thing, it's called a Nure-onna.
Nure-onna are vampiric sea serpents who haunt shores and rivers, looking for humans to suck. They are most commonly found on the shores of Kyushu, but there are stories of nure-onna encounters as far north as Niigata and as far east as Fukushima. While physically much stronger than a human, nure-onna prefer to use trickery and guile to catch their prey, rather than relying on brute force.
They most often appear on the coast near the water or by a riverbank, magically disguised as a distressed woman carrying a bundled up baby. They cry out for help from fishers, sailors, or anybody passing by. When the prey approaches, a nure-onna will plead with him to hold her baby for just a moment so that she can rest.
If he agrees and takes the bundle, it quickly becomes as heavy as a boulder, and her victim is unable to move. The Nure-onna is then free to attack her helpless victim, feeding by draining him of his "essence" with her long, serpentine tongue.
Nure-onna frequently appear together and cooperate with ushi-oni , as they inhabit the same environments and share the same diet.