- "Yes, but more people die if nothing is done about it and it gets lonely here. And you know what happens when I get lonely~"
- ―Stolas, flirting with Blitzo
Stolas is a Goetic Prince of Hell, and a recurring side character in Helluva Boss.
Stolas is a tall owl demon with mainly blue and black feathers with white and gray accents. He has narrow dark red eyes with no visible pupils or irises, and a second pair above those eyes, which can be seen when his hat is off. Instead of a regular nose, he has an owl's beak.
His main body color is blue with a small tail of blue feathers hanging down his back to his feet with black tips, though he has a lighter blue/gray puff of fur on his chest. From the neck up his feathers change from blue to black while his face stands out in a white heart shape.
His arms and legs are both black, he doesn't wear shoes, as he has owl claws as feet. His tophat appears to be a part of his body and made out of fur with a regal yellow feather decal reminiscent of a crown on top.
He is usually shown wearing clothes resembling royalty, wearing a red tunic with gold buttons, gray pants and a plush burgundy surcoat with a white fur collar and puffed striped sleeves.
Stolas appears to be narcissistic, decadent, exigent, and has a regal quality about himself. His house appears quite large containing many pictures of himself along with his clothing around him and he complains of being lonely. Also not unlike the refined aristocrats of old, Stolas engages in extramarital affairs with those of lower social class, such as the imp Blitzo, without apparent concern from his wife. However, in contrast to his normal regal behavior Stolas has a disturbing quality of becoming extremely profane and graphic when discussing his sexual interests. It is unknown if this is a general trait that he displays with all whom he discusses his sexuality or solely a facet of his relationship with Blitzo.
As with many demons, and the denizens of Hell in general, Stolas has a highly questionable moral compass. Being a regular client of Blitzo and his service, Stolas is responsible for ordering the deaths of mortals to advance his own agenda. Among other unknown hits, Stolas arranged for the death of at least one person trying to spread awareness of global warming, not because he did not acknowledge its existence, but in hopes of causing more overall deaths on Earth.
He is also seen as the "dorky dad" type when it comes to his daughter Octavia since he took her to a carnvial called Loo Loo Land. He even wore a Loo Loo Land outfit and wanted to go on rides with her. 
Stolas and Blitzo had a one-night stand. However, Blitzo only slept with him for a book that grants access to Earth and still hates him. Much to Blitzo's chagrin, Stolas hasn't forgotten the night and calls Blitzo for favors his business provides in a clingy, flirtatious manner. And yet, when Stolas wants Blitzo to get something done, he resorts to sexual and violent threats, which visibly disturb Blitzo to the point of destroying his cell phone.
He has only interacted with Loona over the phone. Not much is known about what he thinks of her, however Loona does refer to him as a "clingy rich asshole".
Octavia is Stolas's daughter. At the moment, it is unknown what Stolas their relationship is like. Context evidence suggest that they are on amicable terms enough to sit for a portrait together seen in the background of his home. However it does show that he actually does care about her, but often does thing she find childish like taking her Loo Loo Land. 
- "It gets lonely here."
- "There's a political candidate causing trouble up on earth for a few of my associates. He's trying to convince people global warming exists."
- "You know what happens when I'm lonely, Blitzy? When I'm lonely, I become hungry...and when I become hungry, I want to choke on that red ████ of yours █████ your s████ and lick all of your ███ before taking out your ████ and ████ with more teeth until you're screaming ████████████████ like a fucking baby!" (To Blitzo)
- Stolas is based on the demon from the Ars Goetia, the Great Prince of Hell Stolas, who is also depicted as a crowned owl with long legs.
- When he snores, it sounds like an owl hooting.
- It is shown that after he has sex, he sheds some of his feathers.
- Faustisse states that Stolas is not as powerful as he looks.
- Stolas smokes.
|Main characters||Hazbin Hotel||Angel Dust • Alastor • Charlie • Husk • Niffty • Vaggie|
|Helluva Boss||Blitzo • Millie • Moxxie • Loona • Stolas|
|Overlords||Alastor • Lilith • Lucifer • Rosie • Valentino • Velvet • Vox|
|Supporting characters||Baxter • Cherri Bomb • Crymini • Egg Bois • Exterminators • Helsa • Katie Killjoy • Mimzy • Razzle and Dazzle • Seviathan von Eldritch • Sir Pentious • Tom Trench • Travis|
|Others||Arackniss • Barbie Wire • Collin • Eddie • Fat Nuggets • Henroin • Loo-Loo Land Mascot • Molly • Octavia • Roo • Robo Fizz • Tilla • Villa|