Vassago

Vassago is a Prince of the Ars Goetia[2] and a supporting character of Helluva Boss who made his debut in the episode "Mastermind", after originally appearing in the Hazbin Hotel pilot.

Vassago is a lanky avian demon who greatly resembles a Scarlet macaw, with red feathers, a white face, and a hooked black beak. He also has rather long, gold-tipped purple feathers on the back of his head with a gold-colored streak through the center, and red eyes with no irises or pupils, which are often covered by a pair of yellow visor-shades that vaguely resemble a star or crown.

Vassago wears a red suit-jacket with a gold-trimmed popped-collar, black lapels, a star brooch, a giant "X" and a small star design on the back, and rather long, extravagant tails that are trimmed with black, the top part being purple while the bottom is a gradient of two shades of orange. Over this, he wears a white dress-shirt with two black buttons on the center.

Vassago's clothing also features black pants and white arm-length gloves and thigh-high high-heeled boots - his gloves having black torn-like cuffs and two red stripes in the front, while his boots have black toes and tips of the heels, as well as an "X" shape on the bottom center.

Goetic Demon

Prince of the Ars Goetia[2]

Gay[1]

Stolas

Andrealphus

Fellow Ars Goetia
Stolas (former Goetia)
Andrealphus
Seven Deadly Sins (acquainted)
Lucifer Morningstar
Satan
Beelzebub
Asmodeus
Mammon
Leviathan
Belphegor
Employees of I.M.P (acquainted)
Blitzo
Moxxie
Millie
Loona

Justice
Fairness
Due process and order
Singing/songs

Injustice
Andrealphus
Andrealphus' condescending attitude

Vassago is shown to be a high-strung and mindful demon within Hell's royal hierarchy, though unlike most of the aristocratic elite, he holds the responsibilities of Hell's governance in high regard. As such, he expressed a distaste for unfairness and harm, especially when the matter of another Goetia such as Stolas was involved. This was shown during Blitzo's trial when he noted Stolas' absence and advocated that he needed to be brought in, then being genuinely disturbed when Andrealphus accused Blitzo of being responsible for the assassination attempt on Stolas. Similarly, he expressed annoyance toward Andrealphus' condescending attitude and his attempts to win the case against Stolas going so far as to call Andrealphus an arrogant idiot for his comments.

Vassago has a tendency to slip between English and Spanish in conversations, although he seems to slip into the latter more at times of high emotion. He also seems to have a whimsical taste for music, as he cheered for Stolas presenting his defense in song.

Immortality - As demonic royalty, Vassago is biologically immortal, being able to live for a long period of time and only able to be killed by angelic weaponry.
Platform creation - Vassago can conjure a levitating star-shaped platform for himself to ride around on.

Bilingualism - Vassago speaks both English and Spanish very fluently.

During Blitzo's trial, Vassago demanded that the trial needed Stolas' presence to proceed. He then became annoyed by Andrealphus, who proceeded to have an argument with him. When Stolas finally arrived at the court, Vassago cheered for his arrival and for singing, but was shocked to listen to Stolas claiming to have committed the crime. Regardless, he was summarily sympathetic and saddened to witness Stolas losing his powers and status.

Ars Goetia
Stolas
"YES! Yes! Cántalo, baby! [Sing it, baby!]"
―Vassago, to Stolas
Vassago holds Stolas in a positive regard. He was upset that Stolas was not present during a trial that was about him, and was glad that Stolas had arrived to maintain the trial's fairness, and eager to hear the latter sing. Although shocked by Stolas' confession, Vassago still felt saddened after witnessing Stolas being revoked of his powers and status.

Andrealphus
"¡NO me voy a callar, (I will NOT shut up,) pendejo arrogante! (you arrogant idiot!)"
―Vassago, to Andrealphus
Vassago and Andrealphus dislike each other vehemently, with them getting into a heated argument during the trial in "Mastermind" after Vassago was provoked by Andrealphus' condescending personality.

Employees of I.M.P
Blitzo
Like the other members inside the courtroom, Vassago didn't understand Blitzo's sarcasm and genuinely believed Blitzo would hurt Stolas. However, he believed that the trial itself was unfair, while also being surprised by Stolas' confession of having used the imp.

Vassago: Wait, wait, wait, wait, wait. Where is Stolas, anyway? Can't he speak on this himself? ¿Qué carajo? (What the Hell?)
[Vassago, to Andrealphus]
Vassago: ¿Qué? (What?) Why not?
[Vassago to Andrealphus, surprising that Stolas was not informed about the trial.]
Vassago: If this involves him, then he should be here, no? No puedo creer... (I can't believe...) We need to summon him at once.
[Vassago, to Andrealphus]
Vassago: ¡NO me voy a callar, pendejo arrogante! (I will NOT shut up, you arrogant idiot!)
[Vassago, to Andrealphus]
Vassago: Puta madre... (Motherfucker...)
Vassago: YES! Yes! Cántalo (sing it) baby!
[Vassago cheers Stolas on during his song.]