Heroes of Mana doesn't break away from any of the preconceived notions of what a game like this is meant to be. You, of course, have control of everyone in your party, but you assume the main protagonist's role of Roget. An eager, strong warrior, Roget has a seedy and unknown heritage. Well, duh! I guess if it isn't broke as a plot point, don't fix it. During a reconnaissance mission, you are attacked by the enemy. You and your party must defend yourselves, only to learn that your own military has seemingly used you as a decoy to lure forces away from their capital. An overly vicious attack on the capital throws you in the path of your own countrymen. Fighting to survive and end the cruelty to innocents by your own country, your enemy quickly becomes your ally. Expect several deep, though maybe predictable, story points to push you through the game.
Battle style is important in RPG's. Instead of an encounter-based system where you flash to turn-based attacks, Heroes uses a real-time point and attack method. I am extremely happy not to see multiple pop-ups and static fights, but I wasn't thrilled with the A.I. pathing. Since this is a real-time game, you have to rely on your "point & click" movements to get to the enemy before he gets to vulnerable units. The A.I. pathing doesn't always agree with you, though, and that can be annoying.
So, why did I go through the old Reese's peanut butter cup commercial at the beginning of my story? Well, this actually is a good hybrid of both. On the RTS side, you will have to collect and manage your resources. Then, of course, on the RPG side, level up and strengthen your characters as you travel through the story.
Your ship plays a huge part for your party, not only as transportation, but it also houses the vital production houses for your summonable units and other vital resources. Take care of your main characters and your ship all will be good.