Zzzap’s appearance / voice

Floating inside the sphere was the blinding outline of a man. It was a reversed shadow, like looking at the sun through a man-shaped cutout. Arcs of energy shot from the white-hot figure to snap and pop against the copper rings.
“Morning, Barry,” the hero shouted over the crackling of power.
The glowing figure shifted in the sphere. It had no eyes, but St. George knew his friend was looking at him. A voice made of static echoed over the electric noise. Morning, it buzzed. You ready to head out?”

Excerpt From Ex-Heroes, pg 43
Peter Clines
https://books.apple.com/us/book/ex-heroes/id585738407