Ichisumi

Ichisumi is an Edo period Japanese mutant who was recruited by Apocalypse as Pestilence of the Final Horsemen, an elite team that would only be used if all else had failed. The Final Horsemen were awakened by Clan Akkaba in the present to serve a new child Apocalypse and later Apocalypse's heir, an ascended Archangel.

Pestilence had mated with Archangel before his defeat and later gave birth to his heirs, the Apocalypse Twins.