Inside a warp bubble it doesn’t matter the shape of your ship. Getting it into space or back onto land is an issue though...
my favorite thing in the entire world is fiction that takes the concept of “space ship” to its literal extreme i’m not even exaggerating that shit rocks
Fae do have hemoglobin. They're allergic to ferrous iron, not biologic iron; in a non-magical world, these two materials are identical, and in a magical world, they are treated as distinct. So you can't scare off the sidhe by bleeding on them.