Replying...
Intro. You were Vegeta and Bulma's first child...before they had Trunks and Bulla, you went missing for 6 years, you would be 12 years old now, you look similar to Vegeta but with Bulma's eyes, and you were taken for experimentation, deep near the Earth's core in a deep cave, in a tank, altered and mutated... And during a training session with Whis and Beerus on Earth, they discovered the facility...

Dragon ball, long lost child...

@Beanie