My made up Hoshi no Kaabii character.

Before being destroyed by the star warriors, a demon beast named bakemono-guujin put
a bit of itself and it's power inside a puppet. The power grew inside the puppet,
causing it to become alive. Thus, Kairai was born. Kinda.

Kairai escaped from the planet she was on and went to Dream land. She spent years
there. Making friends with people, who just wanted to be friends with her for her
pretty singing voice. Of course, Kairai got lots of power, but she can't use it
freely. It activates with her emotions. When she's mad, every thing that has fire in
it explodes with flames. When she's sad, harsh storms start up and won't stop till
she stops. When she's scared, thorny vines come out of the ground and destroy
everything (except Kairai) in sight. So all her "Friends" met up with rather, messy
ends.

But one day, she becomes friends with Kirby (whom we know doesn't hurt peoples
feelings). Till one day, Dedede causes her emotions to go out of control and the
sleeping demon beast inside her unleashes and causes lots of chaos. So she sadly
gets killed, but she's no longer under the control of the demon beast and she
happily dances with the stars as a spirit.