I believe entranceway hits all your preferences! It's a medium-paced game set in Wonderland, where events are based off of character memories and intertwined with a large-scale metaplot. It's a bit on the larger side, but it's an extremely friendly and personable playerbase with people willing to backtag for as long as they need to!

Our Steven Universe cast has a lone Peridot - we used to have a Pearl but she dropped - who would adore any castmates, and ngl I would love to see Kaldur there as well

Our TDM is just over here if you're interested!