>>1016496
Why did you fuse the tail with her body? That doesn't just look "wonky", it looks deformed. Do you not understand the visual language of the 2d reference? >>1016307
The tail isn't a big round flesh tube. It appears big because it's *fluffy*. The fur gives it a large profile. While the flesh underneath is likely very thin, as is the case with most animals.

You wouldn't fuse the fur of the tail with the character's body. So it's super weird that her tail is fused with the middle of her back, and her cheeks. Delete the mesh of her tail. Model the back and butt as if the tail doesn't exist. Redo the curve. *Do not* merge the mesh of the curve with the mesh of her body. Rather, play with the profile of the curve, so that the root of the tail comes to a taper. *keep* the curve*, and place the tapered end where her tailbone connects pelvis with tail.

The curve itself can be rigged. So it's ok that it's a separate object. When it comes time to rig, just learn how to assign the points of a curve to bones.