I was looking for someone else, and I found him.

He saw me try to give my own daemon a concussion and decided to bring me home.

[It was more complicated than that, a few weeks of dancing around each other, a standoff of mutual fascination and paranoia. But she is still pretty sure that made the difference - that it made Zane feel less horribly freakish and alone, having someone even more oddly estranged from her daemon around.]