Did yuki had joined to zero has a Hunter at last

Huh? What are tu asking?

Yuuki never become a hunter. She couldn't. Hunters are born into Hunter families, and I don't think anyone who was born a vampire could become one.

NoYuki doesnt registrarse Zero she actually joins Kaname. However Zero and Yuki make a promise to each other. He tells her now that shes a pureblood one día he will come and kill her and she says "ill be "waiting."