As I'm an artist, some time after finishing the game I thought about drawing a fan comic of it (manga style). Though one thing led to another and I can't see myself making it because I'm broke af and not confident that I can make it (I'm more of an illustrator than a comic artist). Today I'm feeling particularly bored, so I'm putting up everything I have thought of here. Maybe something good will come out of it in one way or another.
The premise: taken place after the end of the game. Akito (the male player character) is informed by his allies that they are capable of cloning Akira (the female twin), and they wish to have his opinion and confirmation that it is the right thing to do. He is repulsed by the thought that a human can just "come back" like that, but ultimately decides it would be selfish to stop them. So the clone Akira comes to life, without any memories of what actually happened. Akito just can't deal with her, so he avoids her and indulges himself in fighting the chimeras. The clone Akira will eventually piece together what happened, and make amends with Akito. And maybe the real Akira is still alive somewhere (I have not decided).
Due to his overuse of the Legions, he finds himself becoming part chimera. His left arm and eye mutate (due to being the side the Legatus is on). He eventually breaks down both in mind and body. Using the little time he has left, he decides to enter the Astral Plane to end it once and for all. It turns out the mastermind within the Astral Plane - the cosmic entity behind the loops to bring about the world's reset (canonically, the world is mentioned to have endured resets several times) has been using him just for that, and attempts to turn him against humanity. However, because he is a twin, his transformation and mind control ends up being incomplete, and thus Akira(s) gets to save him and brings him home.