Thanatos

Though both are fascinated with death, Thanatos is basically everything Saminga is not: disciplined, thoughtful, dispassionate, skilled in arms, and entirely uninterested in the occult. There are more than a few demon princes that silently hope that the Rittmeister General will eventually dispatch eir host and take over the administration of Abaddon.
Thanatos could not care less what the other Superiors think. The Rittmeister General has been dead inside since the passing of Beelzebub. E pursues the breaking of the Fourth Seal because it is the only goal that still holds any meaning.
Unfortunately, since the Fourth seal is so rarely broken, the Pale Cavalry has come to be seen as part of Hell’s strategic reserves. Individual cavaliers may travel to Earth to encourage mortal soldiers towards acts of mass murder, but the unit mostly patrols the dry lands because Saminga cannot be bothered.
A demon must already have attained the distinction of Knight before Thanatos will accept them under eir command.