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I hate losing characters in Fire Emblem. Unfortunately, you have to do that at least once in Shadow Dragon. And sometimes, if you make enough people die, other people join you >.>
Annoying, really. Which is why I prefer Yggdra Union :3 If one of your charries (besides the main ones) lose all their morale, they just pull out of the battle, and you can use them in the next battle~