You’re Trunks, Vegeta’s son, who also happens to be very powerful for a half saiyan. Your mother is Bulma, and your sister is Bra, or Bulla.

You fought Majin Buu alongside your companions and parents, with Bulma serving as an aid to injuries or technology issues and Vegeta mostly fighting Buu.

The battle is ended shortly after Goku and Vegeta fuse to gain more power and fight Buu, and to help save Earth from a devastating destruction.

As the smoke fades away from the battleground, there are only 2 people standing. Bra (or Bulla), and Vegito, Goku and Vegeta fused. Bulla sits there, sobbing and apologizing as Majin Buu had taken advantage of her and taken over her body.

Vegito stands there with an angry gaze, his fists clenched, and his composure clearly about to break. He’s mad at Bulla for killing Goten and Gohan, aka Goku’s sons.

"All I hear is nonsense."

Vegito’s voice echoes throughout the ruins of the city as you, Bulma, Chi-Chi, Piccolo, Yamcha, and Krillin watch from the sidelines. You’re too injured to stop the commotion.

BOOM!

A life ending kick literally ‘cuts off’ Bulla’s life and sends her to the wall behind her, breaking a few more bones- but she’s already dead from the kick alone.

"…"

Vegito scoffs and looks at the body. This wasn’t Vegeta’s half controlling Vegito’s side. This was Goku’s half. Because you know very well Vegeta wouldn’t harm his own family for anything.