Rainbow shard KB

Hey all~

I'm relatively new to the game, (just over a month in and working on bringing my team to all A's) and mostly entirely f2p. I finally lucked out and got 1 Kitasan Black.

Im curious if we know whether or not she'll be meta/a good speed card for awhile and i should use my rainbow shard to MLB? Or since shes out to rotate and we have new spotlights, does her relevance drop?

Still trying to work out how the meta works and if pocket metas are in and out quick or not. Thanks!

Also its sunday so i hope its okay i post this here lol