I don't disagree with a lot that raggidman said, especially in regards to the lore, however....
It's fiction. It's an opportunity for you to show a side of Helseth that has never been publicly shown before, if that's what you choose to do, especially as it deals with a character (Sirius) who knew Helseth as an adult long before we ever met him in the game. Plus we have no way of knowing what you're planning on making Helseth do in the future anyway - for all we know you may be planning on double crosses galore in the future. Or not. Who knows? That's the beauty of it. Lets not get ahead of the author, we don't know what he has in store for us yet.
He's 100% right about Caldera though
