Hard to describe. The full story on these two/ one can be found on my webpage (or at least as much as is easy to explain). I was trying to do something a-la Shiro Masamune in the realm of design and body style... I think I did well... I'm trying to do a color version, but it's hard to make Source look backlit properly... Sophie is on the left, and Source is on the right. Short version: Two entities, one body. One is active while the other sleeps, both are narcoleptic... fun! One is shy and reserved, and only works with her rag tag fugitive band of metahumans for her own protection (Sophie), and the other does so because she enjoys it. Pen, ink, pencil, Photoshop and a PowerMac.