The answer to who the four Saiyans alive are depends on the specific continuity and whether or not you're considering non-canon material. Here's a breakdown, focusing primarily on Dragon Ball Super canon:
The most common interpretation considers these Saiyans:
- Goku (Kakarot): The main protagonist, a Saiyan raised on Earth.
- Vegeta: The Saiyan Prince, Goku's rival and eventual ally.
- Gohan: Goku's half-Saiyan son. While half-Saiyan, he possesses Saiyan blood and power.
- Trunks: Vegeta's half-Saiyan son with Bulma (Future Trunks and Kid Trunks exist). Similar to Gohan, he is considered a Saiyan due to his heritage.
However, it is also possible that the question has other interpretations. This depends if you're including characters from older, non-canon material, then there are variations of:
- Raditz: He died early in Dragon Ball Z.
- Nappa: He died early in Dragon Ball Z.
- Broly: Has been reintroduced into the canon in the movie Dragon Ball Super: Broly.
Therefore, if we're strictly adhering to current Dragon Ball Super canon, and interpreting "alive" as of the most recent events in the anime/manga, the most accurate answer is: Goku, Vegeta, Gohan, and Trunks. Broly could be considered a fifth, depending on the context and how strictly the question is interpreted.
