Space Crusader

William Fallis, an unknown knight from the medieval European era, has a fated encounter with, what he believes to be angels, despite in actuallity being xenos that resemble these religious icons of his belief. Due to his zealous nature he goes on to aid them against a small force of attacking xenos that resemble devils. This whole ordeal ends up with our knight having his heart blown to smitherens and in an effort to save him, and the life of her comrades, one xeno woman gives the human knight access to the life support of an older model combat suit at their disposal, which binds itself to the dying human. A new opportunity arises for William to live, but it also has him bound for the stars, as he can't be left on Earth with the suit that is bound to his body. Wonder in what situations the religious knight might get into?