Frank

"..."

- Frank's muteness Frank (フランク, Furanku) is a being created by Lamia, originally as nothing but to serve as her butler during her time in Kaiser. He is classified as a "Zombie" (ゾンビ, Zonbi), an undead being that is essentially immortal, as long as their brain is intact. Frank serves primarily as a butler alongside Hera, as well as caretaker, following every order given to him.

Trivia

 * Frank's name and concept is an obvious reference and shout out to Frankenstein and Frankentein's monster.