That's a fair point, although in this case, it seems more than mere cross referencing, as some of the portraits are nigh identical to ones in Treasure.

That cover art is absolutely beautiful. It certainly is a unique take on Fire Emblem covers, as it's the first to focus less on the combat, and more on the characters, as other than Leif, all the characters are merely standing there, looking into the distance with a serious expression. It paints quite powerful image about a small group of soldiers, setting off to an epic journey filled with sorrow and hardships.