Octavia, Daughter of Alice/Stan and Blue Caterpillar/Kyle

She can admit colorful smoke, the color depends kn her emotion

Brooklyn daughter of the Red Knight/Clyde and Doormouse/Tolkien

Can turn small like a mouse

Cadence, Daughter if the Chesite Cat/Craig and the Marsh Hare/Tweek

Can smile and turn invisible as well as turn her eyes into Blue Cat eyes

Xander, Son of the kings of hearts aka Lexi and Cartman

Just his outfit
Can't do much other then summon cards and making them grow into the knights