nah, size changing is rhoda's power, and her mark is the wierd squiggly thing that looks like two interlocked music notes upside-down from eachother.
Flame mark was justin's streetfighter specials.
Fairy is dex.
Luke is the magnifying glass.
The characters have mentioned 'cat' a few times in that arc, probably referring to catalina, so that would be the logical choice for the paw, given the running gag of her turning into a catgirl in noncanon pages. (accidental foreshadowing?)
Gender symbol is ted.
Smoke cloud - ? (i doubt it's Dianne given that grace didn't react to her presence but did react to Rhoda and Justin only seconds later.)
Contrast icon - ?
more than likely the last two symbols are the other two Marked Dreamers that Luke knows, the ones justin figured out about from the way he was reacting. it would be more straight forward than inventing another two on top of them, and existing characters having new powers would have been forshadowed by now.