Going on from that, here's an interesting proposal. We currently have two main villains of the series, the Order of the Scythe and The Wicked, who (In the background) are beginning to blend together due to Mercury, Era and Moros' Influence. Would Mars be apart of Wicked-Scythe?
Another option, is the fact that I am sort of building a second, much bigger threat in the form of Destruction. That being said, there are others who are working under him who have fallen under Madness. I noticed that Mars has an erratic personality and he is listed as Chaotic Neutral (If we're looking at the spirits in terms of alignment, Destruction is the only Chaotic Neutral elemental spirit) There is the possibility that Mars could be working with Destruction (although he might not appear in the next rp, as Destruction and his Demons will begin to start being much more active next season.
Then a third option is that Mars could just be a renegade not really working with anyone. This would give him more of a reason to randomly ally with the Mythic Knights as he then has no loyalty to anyone who they are fighting against, unlike Moros who has some loyalty to Wicked-Scythe through Era.
I would see him as more of a renegade, since Mars has this habit of not placing his trust or overall loyalty in anyone that isn't himself due to the fact that, in his backstory, many groups are after him because he is a source of near limitless clean energy.
Now that I think about that, this actually puts him into a rather unique position as he might be a source of power for Wicked-Scythe to try and hunt down, and Destruction and his demons might try to destroy him based on his large source of energy, seeing him as a threat. Add on a reason for the Mythic Knights to dislike him (There could be a variety of reasons in the next rp) and that places him in a unique standing of being disliked by all three groups.
Alright, Approved. Just to test something out a little bit, I'm going to give you free reign in this next rp to introduce him at any moment you like.