The Angel of Death clan controls California and parts of Arizona and Nevada and is led by Zachary Angel’s strong-willed father who has the reputation of being something of a jerk. 
The La Muerte and Angel of Death clans are bitter rivals in adjoining territories.  Both clans were unhappy with the compromise of the Southwest during the treaty of the First Organized Synod pushed through by the Matriarch of the Reaper Clan.  This compromise gave California to the Angel of Death clan while granting large swaths of the Southwest to La Muerte.  Both clans believed the other had successfully lobbied their cause with the Reaper Matriarch and were surprised by the outcome. 
The two clans maintain an uneasy truce, one that everyone expects to blow at a moment’s notice.