Let's dig in to the last quest of the game and arguably the best one besides.
A young man whose father was slain by the criminal organiation BlackX, and he's only moments away from meeting the same fate when he is suddenly rescued by a superhero named "Alkarl". Now operating under the alias of "Alkaiser", Red launches a one-man crusade to eliminate BlackX.
Of all the quests in the game, Red's is probably the most "linear". You have to complete quite a few events before you get any free reign. From there it's just a matter of grinding until you're strong enough to topple all four BlackX bases, and after that it's right off to the endgame. Red does get quite a few exclusive characters though (and is quite an ass-kicker in his own right), so no complaints here.