Note that this is an entirely different mechanic from the Ace system used in the Yggdra Union subseries.

Before each battle in Gungnir, it is required to select one potential Ace to lead the troops; the aces and amount vary with the battle. Each stage will have 1 to 3 Ace candidates to choose from. If your Ace dies or retreats, the game ends.

Certain unit classes in your army will have decreased Delay depending on your Ace, allowing for more frequent player turns.

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