Born in Krugis, the Gundam 00 world's stand-in for Rojhelat (Eastern Kurdistan), Soran Ibrahim's childhood ended almost before it began. At the age of six, he was brainwashed into killing his own parents and forced into a guerrilla group, fighting a war he could barely understand, and abandoned once he was no longer useful. But then, a mysterious machine, the 0 Gundam appeared before him. That single encounter became the axis of his life. From that day forward, his dream was clear: to become Gundam himself, to bring others the same hope that saved him.
Under the codename Setsuna F. Seiei, he joined Celestial Being, the organization that built the Gundams and sought peace through armed intervention.
His bond with the three mobile suits he pilots through the story, Exia, 00, and Qan[T], wasn't just about the machines. Each of them carried his ideals, his growth, his very soul.
As the story unfolded, Setsuna awakened as an Innovator: able to share thoughts and feelings across consciousness itself. With this power, he faced the ELS, living metal lifeforms bent on assimilation. While humanity insisted on using weapons, Setsuna managed to bridge the gap between them through communication, leaving Earth to guide the ELS in search of a new home.
By the end of the movie, five decades had passed on Earth, but only a fragment of that time for him. He returned as an ELS hybrid, not quite human, not quite other, yet eternally himself. For the first time, his world had peace. For the first time, he could simply live.
The Setsuna with me is post-war. Though he remains quiet and stoic, he now smiles a bit more gently, talks softer, and is very caring. His passion for Gundams hasn't faded, his Qan[T] rests among a field of flowers, like a symbol to everything he fought for. He still carries the weight of trauma, but little by little, he's learning to accept happiness, to believe he deserves it.
I headcanon that he can deliberately switch back to the human form (since the ELS fully assimilated him, that'd be possible), using it to experience his normal life to the fullest.