Engineering
If Junko was right about the Shosho's announcement, Sienna must have either slept through it or it was the same announcement that had caused her to burn herself, in which case she was too startled and angry, not to mention in too much pain at that precise moment, to have listened to it. Either way, she had no recollection of ever being told that their predicament was a simulation and nothing more, but she wasn't about to call more attention to it.
She closed her eyes, her face still pointed at her boot as she paused for a half second in relacing it as Junko addressed her with the honorific again. "No, just 'Sienna' is--" she began, then cut herself off, sighing as she shook her head. What was the point of arguing about it? "Never mind." She finished with the laces, and rose back up to her feet, looking down at the comparatively shorter Neko with an amused expression, evidently either oblivious to or too tired to care about the fact that she was one garment away from being topless. "Who said this was the first time I saw action?" she asked, tilting her head, her coarse accent strengthening noticably. "And if it was, how would that make anything any different? Was I supposed to just cower in my room and cry, praying one of y'all would come rescue me?" She chuckled slightly at the thought of that comment. "I may not be no soldier, but I ain't no priss, either. If y'all were gonna drag me into your fight, which I had every reason to think you were, I wasn't gonna die sitting down." She started to hook her thumbs through her belt loops, but after brushing her bare stomach with her hand, she suddenly seemed to become more aware of her lack of a shirt, and folded her arms to cover her bra instead. Looking back up at Junko, she maintained the same entertained grin, but her cheeks reddened ever so slightly. "For an army of genetically engineered superwomen, y'all got some pretty classical ideas about gender."