Seven Deadly Sins

The Seven Deadly Sins are a class of Demons who rank directly beneath royalty in Hell's hierarchy.

While the names and arrangement of demons of this order have yet to be indicated, the class appears to be associated with sins, namely, Pride, Wrath, Lust, Envy, Greed, Sloth, and Gluttony.

Trivia

 * The class is implied to be based on real-life demons called The Seven Princes of Hell, as stated in . It is, so far, unknown if they all rule over their own rings, since Lucifer (who is part of the classification representing the deadly sin of Pride), rules the ring of Pride, but also all of Hell. It is also unknown if all of them will even appear in both shows. So far, no demons have been confirmed to be a part of this ranking. However, three demons based on the Seven Princes that have appeared in the series have the possibility of being part of this order: the aforementioned Lucifer, a demon named Mammon, who owns a theme park in the ring of Greed, matching his representation in the classification as the sin of Greed, and Asmodeus, the owner of a sexually-oriented dinner theater restaurant found in the Lust Ring who is even labeled as "The Embodiment of Lust".
 * There is also mention of Satan on a sign that says "Satan Bless" that can be seen being held by a homeless demon in the pilot episode of Helluva Boss; additionally, many characters have cursed by Satan's name in a few episodes. Satan's existence would represent his position as the Wrath sin from the classification of demons.
 * Beelzebub, who is represented as Gluttony, is mentioned in the lyrics for "House of Asmodeus" in "Ozzie's". The aforementioned songs' lyrics imply Beelzebub is female in the series, whereas real-life depictions of Beelzebub are typically male.
 * In "Ozzie's" shown on Blitzo's phone are seven apps, each themed after a demon of the deadly sins from the Binsfield classification or the sin they represent.Blitz's Phone Lock screen and Apps.jpg
 * Lucimaster for Lucifer.
 * Lustinder for Asmodeus.
 * Satan's Workouts for Satan.
 * Bee Eats for Beelzebub.
 * Moneymakerz Bank for Mammon.
 * Sleepy Pillz and Envee don't have explicit hints, but are allusions to the sins of Sloth and Envy.
 * In "The Circus", Belphegor is alluded to through Stolas' Belphegor-themed Happy Pills seen throughout his adulthood.
 * Asmodeus is also alluded by Asmodean Crystals from a book titled "King of Lust: Asmodeus".