This has been part of the character since very early days, but I'm not sure if I still want it to be canon. It doesn't really fit anywhere anymore, or even really come up at all, but I still find it neat in and of itself to do. The idea is that his markings "glow black", but that's kinda hard to do so I just defaulted to purple and it's been that way ever since.
As always there are too many alts. This is the only one I'm posting.
Niv is mine