Rutaba is the prince of Planet Kassava and one of the last surviving members of the royal family bloodline. After being burdened to rule his kingdom after the death of his parents and the disappearance of his sister, Rutaba has defended his people against the rising threat of Planet Saylm. He stands as a polite young man with a noble heart but he will stop at nothing to defend his people while retaining the values and honor as the prince and as a Saiyan from Planet Kassava

I'm looking for someone who can capture the polite aura of the young prince while including that serious nature when the situation calls for it, something similar but not the same as Future Trunks from DBZ.