Real men don't need weapons, so long as they have their fists.
Admittedly, Yui is in a somewhat better position than the rest of Argos because the Takemi has built in wrist blades, IIRC. Still, I'm sure they get guns somewhere, since the OP has Stella shooting at destroyers.
Also, calling it now: only survivors are Yui, Yuuya, and the Scarlet Twins. And Sandek, because if there's one thing I've learned about our Polish "friend", it's that he's a Master Troll.