User blog comment:B214/Question and Answers 6/@comment-29362784-20161221212439/@comment-10330822-20161222075729

No. The Satans are all at least Satan-Class, that's why they are Satans, except Sirzechs and Ajuka, who are even stronger as Super Devils.

A Satan-Class devil could be a Satan, should one of the Satans die. There are only four Satan positions, meaning that there can be many more Satan-Class devils than positions at a time. Take Diehauser Belial, who is number 1, for example. In terms of power, he's probably second only to the Four Great Satans, and even then, he might be stronger than Satans, Serafall and Falbium. He is an Ultimate-Class Devil by rank, but his power is at a Satan-Class, which we established is a power ranking, not a class ranking.

Basically, if a Satan were to die, Diehauser would be one of the Ultimate-Class Devils looked at to replace them. Its how their system works. A devil competes in the Rating Games to increase their power and ranking, so that they might one day get the chance to rule the Underworld as a Satan. Becoming someone like Diehauser is the dream of all devils that wish to seriously compete in the Rating Games.

Now, what B214's quote is saying is that the Top 5 champions in the Rating Games are all considered to be unmovable because of their strength, and the Top 3 are Satan-Class. However, as we found out in Volume 20, only Diehauser is legitimately Satan-Class. Roygun Belphagor and Bedeze Abaddon, who are number 2 and 3 respectively, cheated by using a "King Piece" to achieve Satan-Class levels of strength. Which is sort of ironic, because it means they had to use a King Piece to cheat just so they could be second and third to Diehauser. Which shows how strong Diehauser really is.

Incidentally, EX mentions a "Lord Belial" among the new Satans in the future, meaning Diehauser, may in fact had been promoted, and his family title was used when they extended the Four Great Satans to seven.

Also, feel free to also look at this picture from the Devil page, it shows how aristocratic ranks like Satan, Great King, and Duke plays into the the overall ranking system of the devils, and thus, the Rating Games.