Silver Fin / Rustey Morgans is one of the main protagonist (other than Fairygirl ) of this show ! He is the only son of a well known business man in the city Gachaburg . 

In civilian form, he is rude (sometimes impolite) in behaviour  , but well known among celebrities because of his father  . But even being bitter tongue , he is actually gentle and kind hearted person . That is one of the reason that he chose to being Silver Fin and help and protect  others and in his civilian form, hight admired by Linea / Fairygirl .

As Silver Fin, he is carefree and ( little bit wild  ) partner with Fairy girl and fights with the super villians to protect the people of Gachaburg . He has interest in Fairy girl but she finds him annoying as he sometimes chases her and she already dreams for Rusty .