And the reason I will identify anything I add as "NC"-not canon, is my idea of them is that the five have very different interests in the TF they perpetrate.
One clearly has the backing of most of them, and likes manipulating people's sexuality and sexual organs. He got first crack the the group's resources.
Another likes inanimate object related TFs.
Ones does animate object TFs.
One likes bestial and mythical changes.
And the really scary one like messing with people's minds, and he has a secret the other 4 do not, he knows how to make changes re-entrant.