Atsushi Okubo, when asked in a separate interview who his favorite characters were, laughed, and gave a surprising reason for his answer. “Shinigami-sama, Excalibur, and Mosquito are my favorites because they are rather easy to draw,” he said.
Shinigami is the name given to the personification of death, and the leader of the Death Weapon Meister Academy. His appearance often carries a cartoon like design in order to be more approachable. Excalibur, meanwhile, is a metamorphizing holy blade whose embodiment is that of a bizarre, long-nosed creature in a white suit and top hat, which belies his status as the most powerful weapon in the series. Okubo’s final favorite character, Mosquito, is one of the villains, and he has changed stature and character design several times over the course of flashbacks. His normal form is that of a diminutive old man in a black suit and top hat with a long, pointed nose that he uses to drain the life force of victims.
Ultimately, it looks like Atsushi Okubo definitely has a favorite design style — and that it involves high-contrast three-piece suits, as well as fancy hats!