Kraangdroid Bodysuits
 

I may be a little late on this one but, why do some Kraang have blue suits and others don't?

I always assumed that the blue translucent covering over the metal was so the fake skin they wear would fit well. It's like flesh on the bones. Just my guess.

They all have it, no? I just figured they turn it on & off at will. I've just assumed it was just a means of limiting damage, but Gin's idea makes a lot of sense, too.

the normal metal kraang suits are phase 1 suits, the blue ones are phase 2 suits. Phase 2 works better with the Norman skin.

I thought they were different due to ranking, blue ones were higher-ranked than normal ones.