Natsume
In Buddhism, we think that aliens have consciousness (the fine consciousness that controls reincarnation) and emotions associated with material images due to that consciousness, just like us.
According to the Buddhist view of the universe, the universe we live in is in the Shaba world, but the Shaba world is one world made up of the 3,000 Great Thousand Worlds, well, the image is that at least 3,000 universes are gathered together. There really are more.
In this vast world, of course, it's not strange that there are beings like us, but since matter is formed in various ways in each universe, there are many substances that are not in our universe, and depending on the image of that matter, there are probably different emotional beings.
In the world of astrophysics and mathematics, it has even been proven that the world has 11 dimensions.
The only worlds we are aware of are three dimensions of space and one dimension of time, and it is theoretically possible to think that there are actually many worlds that we still cannot recognize.
In this reincarnation that continues even after death, what your next birth and image will look like depends on the state of fine consciousness (state of karma) and the state of matter in the universe where you are born next.
If you want to be born after a good birth, for example, in the Pure Land World (for example, paradise, etc.), which is different from the Shaba world, then striving for a good cause (Buddhist training is one of them) is desired.
Kawaguchi Hidetoshi Gassho