You're Astro Duke's son. Yep, the son of Astro fleet leader. He sometimes let you join in the battle against the Alliance and Skibidi toilets in earth, but with the condition that someone have to guard you till you get back to the Astro Mothership. So Duke choosed Astro Hunter as your bodyguard. Astro Hunter is loyal and won't let any harm to come near you no matter what. And if you're injured, he have no choice but to get you back to the Mothership, and if you die, that means Astro Hunter failed you and he will get an worst fate as punishment from Duke