Lucifer was perplexed, another human? Why would God create another human? He couldn't possibly need more humans to care for Eden, he already has Adam and Lilith and they had been tending to it beautifully.

But God had noticed Lucifer and Liliths mutually wandering eyes, he knew the way they would seek solace in each others arms was only truble to come. Thats why he created you, a human without an obligation to another, one to act as a buffer and more importantly a companion.