This is a Xui, the most advanced species of alien in my universe, they are very reclusive and for the most part do not interact with other species of alien, in fact they are very judgmental of other alien species, most see less advanced species as lesser beings, though not all, those who don't hold such a negative mindset will often break away from their ships to observe others more closely, often choosing a new name, because their names are often just species title with a number, seen on the back of their suits, something like [XUI-5012]
Their tail is prehensile, and they have purple blood.

Xui are very powerful psychics and mainly use that to communicate, but with training they can learn to use spoken language!
Almost all Xui are men, this is because long ago a chemical contamination wiped out the females of their species, but Xui can of course transition to female!

They reproduce mainly by a form cloning, or getting a procedure to be able to carry eggs, or less reclusive Xui may go out and find a partner of a different species.