So where did these common designs of the TMA cast come from? Some I see are pretty constant (Melanie, Jon, Peter, Michael and Helen Distortion) and others fluctuate so much (Martin, Daisy, Oliver). 

There are a few that LOOK the same but aren’t (Tim, Georgie, Mike C) but still… where did it come from. 

There are so few descriptors of these fuckers what made y’all decide on THESE traits?

Edit: mostly asking cause some girl in a fb group was asking about how to cosplay Melanie and many people brought up the blue hair. And she doesn’t want blue hair lol