For discussion:

What do you guys think the symbol is? *edit* The "Helix" */edit*

It keeps popping up, most notably as a tattoo on Jessica's shoulder (but not Niki, I believe). It was also recently used as a symbol for the sword repair business where Hiro was trained, and in the latest web comic as a ring that Hana was wearing. These are just three of a variety of locations its showed up.

I'm not sure what to make of it.