If someone is considering suicide, it's given that they have a horrible family almost all the time.First bullies, now his own family. Is there anyone in Kiba's life that genuinely cares about him?
Probably she had a friend who lost their life because of bullying. This is probably her coping mechanism.The thing with puppets is that just like with any other toy, you will grow tired of it eventually.
I wonder if this is more about them fixing each other, or him dodging landmines.