A looser adaptation of the Five-Man Band. Generally speaking, it's bad form to have two major crew members on the show who essentially perform the same job (unless you have a multi-team Heroes Unlimited situation). That would lead to inevitable comparisons between the two, and probably lots of flame wars. Does not apply to Evil Minions who sometimes come in faceless dozens, but does for, say, Battle Butlers or Dragons. Not So Similar is the super trope. Compare Divergent Character Evolution, which happens gradually and isn't as deliberate. Examples of Cast Speciation include: