This creature is an unnamed humanoid alien slave.
The humanoid has the ability to transform from a Human into its true form. When in Human form, it looks very similar to a woman judging by its look. When transforming to its normal form, it has a long neck, brown hair, multiple tentacles on its face, mouth, and back, three fingers, and a slender body.
- American Dad, s09e18, "Lost in Space" (2013)