Who should I upgrade first to six star for GB12 and toa?
#upgrade loren or kro2A to 6
thin plank
molten mural
Both need to be 6*, so it does not really matter
But I would do Loren, since she is needed for icaru 2A
thin plank
Ok
fiery shard
Both need to be 6*, so it does not really matter
but it does matter, since loren is used in team 1 of gb12 and kro is used in team 2
molten mural
Oh, my bad, seems like I was accidentally correct 
Then it's settled - Loren first, then when you have a team going make kro
thin plank
Ok