At first glance, its stats dont seem anything special, but if an opponent wants to challenge any of your characters while Tiana is exerted, they either get -3 strength, or pay three ink to remove that penalty
And, beyond that, she can also be used with Stitch's Rock Star and Carefree Surfer cards, giving you their additional benefits, all for the cost of one ink
If exerted be that through singing, questing, using one of their abilities or other reasons in another players turn these characters can be challenged, requiring the challenger to exert their own card and then resulting in both characters simultaneously applying their strength to their rivals willpower
While he's part of the main set, not the Commander precons, I don't see Zell Dincht being a Standard-playable card
Nomad Outpost ($2) Feeling the theme here