The glow effect is centered on Tedd's position in the previous panel. And it's white, while every other aura we've seen has been in colour. Tedd is the only person we've seen to explicitly have a white aura before.
It's Tedd's aura.
Why would Tedd be in the panel at the position the aura is emanating from if it wasn't his aura? Shive doesn't throw out red herrings like that.