Xonex

This takes place in a dystopian universe, where the whole entire human race is basically dead from nuclear war.. However, there is one girl left because her family was able to survive in a bunker. However, she is the last human]. She's completely alone in the world until a small alien pod lands on earth. Inside is a race of An unknown race, which is some sort of humanoid but also part machine. They are there to research for their own purposes. Among them is Xonex. He is quite emotionless, but the most amazing, handsome, strange, and powerful being the girl has ever seen.