Sometimes my own personal headcanons feel more real to me than the actual canon. Not just with regards to 07-Ghost, but in almost every fandom I've ever been in. In the case of 07-Ghost, I imagined an epic war between Verloren and the protagonists. We never got to see the Chief of Heaven's face either. Same goes for Mikhail and Raphael. Furthermore, Ouka's character remains somewhat underdeveloped. I feel like the authors jammed her in just to have a female lead. In fact, even Raphael is more interesting and relatable than her. To me, at least.
But at the end of the day, as the saying goes: opinions are like assholes. Everybody has one.