Say what you will of Gudako's sanity. Or basic decency. Or Human Empathy. Or Capacity for reason. Or a great many things Roche suppressed lest she questioned the benefits of her friendship too closely.
What was undeniable in all things was that Ryuko had a flair for showing off and, amazingly, not flubbing the landing either. A truly marvelous feat of acrobatics and style to record, from fancy aerial twirls to the lightning fast gunplay the orangette adored. There was only the teeniest, tiniest problem that had Roche pulling a fragmentation grenade from her belt yanking out the pin.
That being, while a heavily armored juggernaut was a slow easy target, it could afford to do so because it was
heavily armored. Seeing as she would receive no end of complaints if she simply bypassed all of that and roasted the beleagured mini-gunner, Roche opted to whip a grenade with a seasoned familiarity, bouncing it right between the brute's legs where it lost all momentum bouncing between firmly planted boots.
Fire would have made it certainty, but at least with an explosion Gudako could save some face before her viewers.