Kaoru 17
At First Sight: The first time they meet, she accuses him of being a murderer. But after he helps her deal with that problem, she invites him to stay with her at the Kamiya Dojo, saying she doesn't care about his past. And that is probably what makes him stay, even though he has to do all the cooking and cleaning. ^_^;
Relationship: More than just homeowner and guest, I'm sure. They love each other deeply but don't show their affection enough. So their relationship won't be going anywhere if it isn't for the villains, who get Kaoru kidnapped, and Kenshin a chance to go rescue her. Okay, I'm just kidding. Their relationship is going well. And, Kaoru, you don't have to worry about other women. He loves you and you only.