The game starts with only one hero, Guy. After the player unlocks other heroes, they can be selected at the Hero's Tavern in the beggining of the game.
Each hero starts with different attribute values, one passive ability and one skill. As they explore dungeons and kill monsters, the characters gain experience points and level up, allowing the player to upgrade their basic attributes. There is no class restriction when it comes to upgrading heroes and choosing equipment; therefore the player can build the character the way they see fit. For example, Svafa (mage type) can be made into a Warrior with lots of mana by leveling up her strength.
Although heroes' attributes are reset to default values everytime the player starts a new game, certain events can permanently affect this default values.