Slotos

Slotos (スロトス) is a devil who serves Nacht Faust, the vice-captain of the Clover Kingdom's Black Bull squad of the Magic Knights.

Appearance
As a devil familiar, Slotos appears as a small, dark-colored figure with horns, wings, and a tail.

When merged with Shadow Magic, Slotos appears as a large, black figure with black horns and a purple, horse-shaped mask.

Biography
After Nacht Faust interrupts a captains meeting, he summons four masked beasts to stop the captains from attacking him, with Slotos holding back Jack the Ripper. After Julius Novachrono vouches for Nacht, the captains relax and the beasts disappear.

When Asta defeats Liebe and insists on forming a contract of equals with the devil, Slotos appears alongside Gimodelo and the other devils. The devils cling to Nacht's head and shoulders as Nacht enters the circle and compliments Asta's choice. Slotos and the other devils disappear when Gimodelo merges with Nacht to continue of Asta and Liebe's training.

After Nacht admits defeat, he leaves behind Gimodelo to continue Asta and Liebe's training since their union needs more work. The devil is terrified of the possibly lethal attack again, and Nacht's other devils comfort Gimodelo.

While fighting Dante Zogratis, Nacht summons Slotos and merges with the devil in order to withstand the increased gravity and to buy time for Jack the Ripper's Slash Magic to adapt.

Abilities

 * Toughness (剛健): When Slotos assimilates with Nacht via Unite Mode: Equus, Nacht's physical resilience is greatly enhanced, allowing him to withstand and move in immense gravity.