The Invaders, and The Alliance

The enemies, which we will refer to this fanfic as invaders consists of mainly 5 races.

The Gastreas, Demons, True Gods, Devils, Fallen Angels. The only Fallen Angels and Devils that will join the enemy's side are strays, and the Old Satan Faction.

And each have their own specific ranks. The Fallen Angels and Devils will follow the same titles used in the original anime. Which is low to Satan Class.

The Gastreas as divided based on their tiers, and I will place the general ranks next to them so that you'll understand how strong they are, I think.

Tier V: God rank

Tier IV: Satan

Tier III: High

Tier II: Middle

Tier I: Low

For the Demons, they are divided based on their nobility, which directly corresponds when their individual strength.

Emperor/Empress: God rank

King/Queen: Demigod rank

Archduke: Transcendent rank

Duke: Satan/Seraphim Class

Marquess: Ultimate Class

Earl: High-Class

Viscount: High-Class

Baron: Middle-Class

For the normal demons who hold no nobility title, they are called:

Catastrophic Abominations:

Since they feel no sense of pain, fear, or emotions. They only have one thing in mind and that is to kill and eat. They make up 70% of the enemies entire army. And most of them are demons that absorbed the characteristics of animals and beasts

On the Enemy's side we have 6 True Gods.

True God of Lust, Xaosis:

 - Beginner layer of Divinity Rank

True God of Sloth, Omona:

 - Beginner layer of Divinity Rank

True God of Envy, Roxanne:

 - Experienced layer of Divinity Rank

True God of Wrath, Brigyn:

 - Mastery layer of Divinity Rank

True God of Pride, Enir:

 - Peak of Divinity Rank

True God of Gluttony, Velos (Ceil [Diangelion]):

 - Beginner layer of Cosmic Rank 

I forgot to mention this before but, Origin and ??? Races can't be counted in ranks since they are too powerful, and the only ones in the Celestial Rank are the primordial children.

For the Alliance, basically all mythologies of earth combined together, but the only factions that you need to remember are:

Heaven Faction

Devil Faction

Fallen Angel Faction

Greek Mythology

Norse Mythology

Roman Mythology

These are the only faction you need to take note of. Of course they all have individual ranks

For the Devil, Heaven, and Fallen Angels factions.

The strongest one that they have are Satan/Seraphim Class, and they will follow the same rankings according to the original series.

For the Devil Faction we have

Super Devils

Pure-Blooded Devils

Half-breeds

Mixed Heritage

Reincarnated Devils

I don't really want to base their strength based on their nobility and ranks, since strength doesn't always equate to a higher rank in the devil faction. Someone with a certain extent of accomplishment and contribution to the faction can have a higher rank.

For the Heaven Faction we have:

Pure Angels

Reincarnated Angels

Miracle Children

The strongest rank that they have are Archangels, which is equivalent to beginner layer of Transcendent rank.

The only known Arch Angel right now in Heaven is Michael.

Next to Archangels are Seraphs, which are all at the peak of Seraphim Class.

For the Fallen Angels Faction...

We only have 2, I think?

A pure breed Fallen Angel

A half-breed

With the strongest rank being the Governor-General, followed by the Cadres.

For the 3 Mythologies... It's another story.

Zeus, Odin, and Jupiter are all at the Transcendent Rank, while the gods of each Mythology ranges from High - Satan Rank.

Finally, the Forsaken Faction... I will have to create a separate chapter for it since it will take a shit ton of words to explain the ranking system of the faction, and all of the races under its command.