Nova

Nova (ノバ, Noba) is a extremely powerful A-Class Daemon. A Demon of Fate, Nova has set its sights on Gai Nagareboshi, attempting to gain control of the Mototsu for unknown reasons, and as such, has targeted all that he holds dear in the process.

Inferna Falx
Inferna Falx (非道鎌, Latin and Japanese for "Infernal Scythe")