The curiosity that plagued him from their initial meeting should've forewarned him of the trouble she would cause.
And yet he kept coming back for more. Invited her to stay at the shiro, trained the kit, encouraged her interactions with his mother.
Dreamed about her.
Sesshoumaru was a warrior, one bred for battle and to deal in facts and absolutes. But he was also selfish, wanting the best of everything, and there was nothing he wanted more than her.
The fact that Tenseiga had not only answered her call but shielded her from the horrors of the underworld meant more than she knew.