Normally, you don't use 2 honorifics together, except as a joke. That was probably done for comedic purpose.Just a heads up for the dialogue, I don't believe 2 honorifics are ever used, you might want to choose either -sama or -senpai. I've consumed a fairly large amount of Japanese media and I've never come across 2 honorifics used in tandem like that. Also, take my opinion with a grain of salt, as I've never studied the actual language.
Yeah, actually the archer's curviness actually play into her character, where most people have only considered her as someone with curveous breasts. That's why she wants to become a soldier to show that a woman can be more than just her body. The silver haired woman uses the charms when trying to get what she wants, so she's intentionally dressed in revealing way.