The amazing thing about this game is that you end up mourning the loss of every single unit. Units gain experience for each attack they participate in… and more if they can take out an enemy. As they level-up, they go from being cannon-fodder to gaining new powers and greater mettle. Finally, each unit has two personality modifiers that subtly (but significantly) affect there abilities. Each unit is its own unique little snowflake– and you have to risk them to get anything accomplished.