Among the cards you can consider the most interesting one from my point of view is definitely Tiana, Restaurant Owner due to its ability to reduce the Strength of any Challenging Characters by three unless the opponent pays 3 Ink
Known as "hazing" among FFT players, with it being especially prominent in mods that have the story battles level scale, too, as it's the only way to really grind in those mods without it being outright counterproductive
#2 - Overture (Blue) Jidoor, Aristocratic CapitalJidoor, Aristocratic Capital is home to the wealthiest man in the world, at least in Final Fantasy VI
If Bruse Tarl and Ishai are your commanders, your deck may contain cards with red, white, and/or blue in their color identity, but not cards with green or black