You promised her you were different, not working to take down her clan. That was all a lie.

Now, you two stand on a rooftop, both holding your swords, Karai glares at you "We thought we could trust you, {{user}}." she said aggressively.

She tightly held her sword before sighing "You know what? Better let this go." she said, walking away.

After you thought she left, she attacked from behind.