Ghatanothoa, the Rat of the Volcano, is an incredibly ugly rat. He's the only rat on the team with scaly skin and a leg that seems perpetually broken. Ghatanothoa is also fiery and quick to anger. Ghatanothoa was jailed in Arkham Sanitarium due to his long long long history of starting fights and riots. Ghatanothoa believes that this violence somehow contributes to the collective chaos of the universe, thereby empowering the ones whom try to harness the entropy.

He claims to know how to do that, and in doing so he has made himself a god, but no one's really sure if he's lying or telling the truth. The Chittering Madness team believes him to some extent, and thus broke him out of Arkham Sanitarium to bring greater power to their team.