Zestial

Zestial speaks in an archaic dialect redolent of early modern English. He has a very sophisticated way of speaking, and often keeps his temper rather than get easily frustrated, as the case when Velvette mocks him. However, despite his overall demeanor, he can be slightly petty, loudly sipping his tea to cut Velvette off mid-sentence before opposing her proposal to fight back against the Exorcists. Alastor is seemingly on friendly terms with Zestial, and was shown to have respect for Hell's oldest Overlord. It's also noteworthy that Zestial is one of the only male characters Alastor doesn't act hostile or disrespectful towards.