Characters cannot be used on the turn they're played because, as the Lorcana rulebook says, "You need to wait for their ink to dry!" After waiting one turn, your now dry characters are free to challenge opposing characters in an attempt to deal enough damage to send them to the discard pile
These cards are both collectible and playable, and since character Cast Members all learn the signatures of the character they play, there should be a uniformity here for collectors, no matter which park's characters might be signing
Merlin, Goat 6
Still, I wanted to shout it out
Next in line is obviously a Chaos Orb
This means that this version of Belle works great as a target for shifting others on to, like Rise of the Floodborns Hidden Archer, or the upcoming Belle, Accomplished Mystic in Ursulas Return