sentences:  Rivera is portrayed by .is a Madō Horror who was originally a Makai Knight assigned to oversee the ritual under the Hill of Zedom's Arm fifteen years prior in case of a Horror outbreak.However, due to Tousei's actions, Sonshi was stabbed with a Madō Horror Plant and became the first Madō Horror sired by him while forced to kill Sari and Rikyo before taking Hakana to Vol City.