A black mask from the Kiefer Sqaure neighborhood.
He might have the ability to shapeshift into a wolfhound or similar dog creature.
He has (or had) an older brother, Mick Keneally, who "grew up to be a stinker," according to Steeljack.
There might be a connection to the Keneally name with super powered beings in the Astro City populace. Keneally would seem to have powers and there is a Miss Keneally at Butler's which is rumored to have a powerful empath on staff.