I think I'm going to go with D, because we chose ice earlier.
Well, if character consistency is a concern, we must keep in mind that our boy Senya is now Man Senya. Approximately this much Man:
He's changed, and so too did his morals and views on the world. We have the chance, right now, to shift his character and personality. Here is how I see it from a character perspective
A- possibly, he was a petty thief in his youth, though given the recent events, I don't see him taking up larceny just like that, especially on so grand a scale.
B- cool as it is, I just can't imagine him taking up crime, what with his selfless heroics since we ASSUMED CONTROL (we should open a boarding school, bros, and bring up the applicants like we do our characters. The world will be better for it.) and all. He's fine with killing bellugerents and his enemies (and even then, not always, as the Gallardo situation established), but the civilians he almost gave his life to protect? No way.
C- Possibly, if only because it will help Kyrie in the long run and is probably the fastest track to finding her. He does have an attachment/budding love for her (look at all the shit he's done for her), and no small amount of distaste for the Empress, I'm sure.
D- considering that Azo is Shulgi's man, and Senya doesn't trust the guy all that much (and tried to beat the shit out of him), probably not. And I also don't see him as wanting to get into politics and Mr. 47 stuff (although one thing this has going for it, I admit, is a "Hitman: Blood Money" campaign GM'd by treave, holy shit yeah), since Azo will be having him run "wetwork" for him. On the other hand, the man does like screwing around with arrogant assholes and isn't afraid to get his hands dirty.
Recent events accounted for, though, I don't see it.
E- very much an option, all the recent events considered: risked life to save the emperor, protected his boys on sorties and fought valiantly himself, stood up to the Empress' authority on matters where she overstepped her competence and was generally a cool guy. Risked his life to save many tens of millions and is still kicking and ready to go.
F- I just don't see it, he's not a quitter type.
Uh-huh, so all this time Senya was drinking Ean's Golden Goo. And apparently Ean did "pollinate" humanity with superpowers, if us, Rei, Gallardo and "Framekiller" Camna are anything to go by. Maybe Shulgi wanted the catastrophe to awaken their powers or something. I suppose we'll see.
Edit: oh, and very much what Lambchop said. You guys know we won't last long on such delicate matter. Batman is right up our alley.