Because it has a powerful ability that lets you ready cards again and can earn 4 Lore when it quests, its coveted by both players and collectors
The artwork for Tiana, Restaurant Owner is fantastic, depicting her in the center of her restaurant, with waiters dancing around her, her friends and family behind her, and the trumpet playing alligator enjoying the nightlife
Throwing designs at the wall I asked members of my team to submit designs for things they would be personally excited to see in a FINAL FANTASY set
After our first couple matches, it became clear that the Sapphire/Steel and Amber/Amethyst decks were a tier above the Ruby/Emerald deck, but each was enjoyable to pilot and had fun pseudo-combos to discover
Maybe if the meta is overrun with Lilo - Making a Wish and such, she might be a decent option
Once you flip her, she also buffs the team