Zestial

"We know not how this perished. Mayhaps t'was not by a demon's hand at all. If we rush to war without knowing, mightn't they purge all of Hell for daring an uprising?"

- Zestial, to Velvette regarding the proposal on fighting against Heaven

Zestial is a demon and one of the many powerful Overlords of Hell, as well as the oldest Overlord. He made his debut in the episode "Scrambled Eggs".

Appearance
Zestial is a very tall, slender spider-like demon with dark gray skin and lime green eyes. He wears all-black clothing, with a pitch-black cloak that covers most of his body. When Zestial unfurls his cloak, his eyes glow and the top pair gain red irises.

At the front of his cloak is a large black spider with lime green stripes on its eight legs, as well as lime green eyes and lime green on its back. The interior of his cloak is lime green colored with a spider web pattern and four red spider legs extending across the cloak.

He also wears a distinctive big black top hat with a light grey patch at the front, along with a gray colored skull and a lime green and red striped feather on the right side.

Personality
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. Though he is shown to be somewhat petty, loudly sipping his tea to cut Velvette off mid-sentence before insulting her.

His reputation is such that demons other than his fellow Overlords are terrified of him, hiding or cowering whenever he passes by. The sight of him causes one civilian to set himself on fire out of fear. Even Alastor appeared to be on edge upon meeting him during a walk.

Befitting his advanced age, Zestial is extremely patient and cautious, telling Velvette that they shouldn't take immediate action in spite of being given proof that Exorcists can be killed out of fear of the potential repercussions.

He is also shown to be rather compassionate to those he is close to, sensing something was bothering Carmilla and offering her an ear to vent her concerns and problems to.

Abilities

 * Demon Transformation - He can change into a stronger demon form.
 * Conjuration - Zestial is seemingly able to create objects out of thin air, doing so to produce a full cup of tea and plate during the Overlord meeting.

Skillset

 * Musical Talent - He is adept in singing.

History
Nothing is currently known about Zestial's past except that he is known to be one of the oldest of the Overlords in Hell, referred to as "ancient" by Alastor.

Hazbin Hotel pilot
After the recent extermination, Zestial is seen in a room that he hid in with Carmilla Carmine and Zeezi, alongside Lucifer Morningstar.

"Scrambled Eggs"
He approaches Alastor and the Egg Boiz on a street and says that it has been years since he had seen Alastor. They both walk to Carmilla's building for a meeting.

After Velvette presented a deceased Exorcists head and proposed to fight back against the Angels, Zestial commented that they can not act without any further intelligence on the matter.

After Carmilla ended the meeting, Zestial followed Carmilla and her daughters to her office to talk to her and suspects Carmilla to be the one who killed the Angel, since he says that being angry isn't likely of her. He further comforts her on the matter, encouraging her to talk about it.

Alastor
Alastor is seemingly friends with Zestial. Though, they have only interacted in few situations in the show only in episode three. In the third Hazbin Hotel Episode, Scrambled Eggs, Alastor greets Zestial and, later on in the conversation, the latter asks about where the former has been when Carmilla Carmine says she does not care and no one else asks him.

As shown, Alastor has a respect for Zestial as one of Hell's oldest Overlords and does not underestimate him. As shown where Alastor keeps his guard up when in his presence.

Carmilla Carmine
Carmilla protects and defends Zestial when Velvette is rude to him showing that the two have a good relationship. As stated by Carmilla, Zestial and Carmilla have known each other for a long time and have been friends and as well as allies as Overlords. As shown, Zestial was also able to tell that something was also bothering Carmilla and offered to hear her out to help get it off her chest and was able to easily deduce that Carmilla was the one responsible for killing the Exorcist that Velvette had brought to their meeting by her facial expressions.

Trivia

 * According to the "Clocktower Countdown to Premiere" livestream, Zestial is the oldest Overlord in Hell, with Alastor referring to him as "ancient" and Velvette insulting him with "grandpa" and "fossil". Whether he is the oldest by age or how long he has reigned is unclear.
 * He shares the same voice actor as Vortex and Asmodeus in Helluva Boss, being voiced by James Monroe Iglehart.