Assassin's Creed Valhalla is the latest game from the long-running and highly successful Assassin's Creed franchise. This particular Assassin's Creed title took the series' Isu storyline and pushed it further, with the introduction of the Aesir Isus.

RELATED: Assassin's Creed Valhalla: 10 Things That Can Ruin Your Playthrough

The Aesir Isus, known in the real-world as the Norse Gods, is a different branch of Isus who sought to find a different method of survival from the Great Catastrophe. The result of this yearning was their reincarnations, various characters the players encounter in the game. One of these reincarnations is Eivor, the game's main protagonist. These reincarnations and their Isu counterparts make the story of Assassin's Creed Valhalla so much more engaging than it already is, but players will most likely have more questions than answers regarding them after they've beaten the game.

Warning: This list contains spoilers for Assassin's Creed: Valhalla.

10 The Marks On Their Necks

One clear commonality between all the Isu reincarnations in the game is that they all have is a distinct mark on their necks. During the final conflict in the Isu temple, Basim pins Eivor down and demands to expose their neck. Basim is making sure whether or not Eivor is a reincarnation.

The reason for this is unsure, but the reincarnations can connect to the machine in the vault attaches to a person's neck, allowing them to live their lives in Valhalla as Isus.

9 A Reincarnation Can Be The Other Sex

One thing that's apparent with Isu reincarnations is that a reincarnation doesn't need to be of the same sex as their previous life. Eivor is the most evident example of this. Odin was male and his reincarnation, Eivor, is believed to be canonically female, despite the game allowing the players to play as a male Eivor.

It is, however, more common for a reincarnation to have the same sex, even the same face as their previous counterparts.

8 Halfdan Is Thor's Reincarnation

In the game, the cut clear Isu reincarnations are the following: Eivor for Odin, Sigurd for Tyr, Basim for Loki, and Svala for Freyja. One other major character in the game not that many people may know is also a reincarnation is Halfdan.

RELATED: Assassin's Creed: 10 Things You Didn't Know About Desmond Miles

Halfdan Ragnarsson, one of the sons of Ragnar Lodbrok and the Conqueror of the North. He is also the reincarnation of Thor, the Norse god of thunder. The game was very direct with how it introduced the character. Halfdan and Thor also have the same face model and voice actor.

7 Faravid May Be An Isu Reincarnation

One of the less obvious Isu reincarnations is Faravid. It is yet unknown exactly who Faravid's Isu counterpart is. A lot of people seem to believe that, due to his relationship with Halfdan, Faravid may be the Isu reincarnation of Jormundgandr.

Jormundgandr, or the World Serpent, may simply be another Isu character instead of being a literal World Serpent. In the game, Halfdan is always paranoid that Faravid may be poisoning him, which may stem from the fact that, in the mythology, Thor dies from the World Serpent's poison.

6 King Harald Is An Isu Reincarnation

As established, one of the distinctive features of Isu reincarnations is a specific mark on their necks. One character almost everyone will miss has this said mark is King Harald.

It is close to impossible to spot King Harald's neck mark, mainly because he only appears so briefly within the game. However, the players can absolutely check for themselves by utilizing the game's Photo Mode, should they wish. In regards to who King Harald's Isu counterpart is, but it is believed that he is the reincarnation of the Isu Sif.

5 There Are A Total Of Nine Reincarnations

Based on the True ending, which the players can attain after completing the anomalies mystery in the game, there were eight Isus who plugged themselves into the life tree to be reincarnated, with Loki sneaking in afterward, which makes nine.

The Isus that are known to have been reincarnated are Odin, Tyr, Loki, Freyja, and Thor. It is also already known who their reincarnations are. Another Isu who was also reincarnated was Heimdall, and his reincarnation is a man named Rig.

4 Rig Reidarasson

Rig Reidarasson was a Viking warrior who settled in England before Eivor and the Raven Clan even set foot on the land. As a child, he often boasted how he has "drunk the mead of Odin" and that he has sat at the great table with the Aesir gods and they all know his name.

RELATED: Assassin's Creed: 10 Things You Didn't Know About The Templars

As an adult, Rig would be haunted by voices in his head. He heard commands such as "ready your queen," among others. After successfully obliging the commands of the voice in his head, he was told that he was "Odin's perfect son, Heimdall."

3 The Seventh Solution

When the Isu detected the coming of the event later known as the Great Catastrophe, it was already too late for them. Around this time, the Isu was engaged in a war with the humans, which is why they were so preoccupied to prepare for the impending threat.

When they discovered the threat, however, the Isus formulated six different methods for their survival. However, they would prove to be ineffective or it would take too long to complete. The Aesir Isus, however, formulated a different solution. They would upload their consciousness into the Yggdrasil, an Isu supercomputer, so they would be reincarnated later.

2 Svala Discovered Valhalla Using Freyja's Memories

Svala was the reincarnation of the Isu Freyja and the mother of Valka. She was a seeress who lived with the Raven Clan before they moved to England. As Svala grew older, she began to inherit the memories of her old life.

When Freyja knew she was going to meet her end, she made use of Freyja's memories to gain access to the Yggdrasil, which she successfully managed to do. Before she died, she reached the Isu Temple underneath Hordafylke and uploaded her consciousness to the Life Tree, allowing her to live as Freyja in Valhalla forever.

1 By Fate Or By Design

One glaring thing about the Isu reincarnations that may seem like plot holes is the fact that they're born so close with one another. One might think that at least one of them would be born in a later century, but that's not the case here at all.

However, there's one very simple explanation for this. Their reincarnation wasn't done using random magic, it was done using Isu technology beyond human comprehension. It can be reasoned that when the Isus uploaded their consciousness into the life tree, they intended to be reborn around the same era.

NEXT: Assassin's Creed: 10 Things You Didn't Know About The Assassins