@justforthelulz They weren't named in this chapter, so I assume hamatyonn just hadn't come up with names for them yet. It seems like the battle division was also renamed to the security division.
I have a feeling this is gonna go down the route of the fiance wanting her to get raped as an excuse not to marry her, and I'm not sure how I feel about it...
@Dariusdd Chapter 16 actually was part of volume 3. It was released early through Comiket for whatever reason. That's how I was able to get better raws for it.