[Moku203]

I personally just kinda throw one together that sounds good phonetically and looks good visually that can explain the general air or look of said character. 

Kiki being a good example, she has alias' like Mystical Magician for her magician outfit, Glittering Glamrock for her rocker outfit, Raging Recondite for her anger red star look, and of course Wandering Wonderment, and Monochrome Meanderer for her Clown and Mime respectively.

otherwise it's often very basic things such as Aynn being Motherly Zeran, Armored Zeran, Suited Zeren etc etc.