Kuhaku turned his focus from the advancing robots over to Gren and slightly tilted his head in curiosity. His Semblance didn't seem to affect Gren noticeably or at all, even. Strange. Was there something wrong with Kuhaku? He frowned as he mulled over what could've gone wrong but then refocused on the ever-nearing robots. As Gren tore through a straggler, he gave Kuhaku the answer he needed, "I'm ready when you are!"
Grinning, Kuhaku took his sword and began to smack the front of his shield with it, the metal clanging and clanking loudly as he did. As he made his racket, the eight or so robots were now completely focused on solely Kuhaku, either ignoring Gren or having completely forgot about him. "These robots aren't too bright, it seems" he thought. With the robots advancing ever-slowly towards him, Kuhaku stopped his banging and punched downward with his shield, digging its edge into the ground. He then released his shield to remain in the ground and hid behind it. Swapping his sword into his left hand, he reached into his pocket with his right and pulled out..
A blue vial of Dust.
Smirking, he stabbed his sword into the ground and inserted the dust vial into a small hollow in its spine. Immediately accepting the ammunition, the sword's spine separated and slid back and then returned forward to its original position. Chambering the dust vial within itself. Removing the sword, Kuhaku's glowing blue eyes peered over the top of his shield just in time for a robot to swing at him. Ducking, he quickly grabbed his shield and removed it from the ground to raise it in time to block the attack. The metal fist bouncing off the face of the shield with another metal clanging. Kuhaku braced himself and kept his shield up as the robots were upon him, close enough to swing their mechanical arms at him. "I've only got a few of those rounds, better use them sparingly..." he thought as he withstood the robots' attacks.
Standing his ground, he waited until all of them surrounded him to within a few feet. Their fists and his shield clashing loudly and even sparking a few times. Eyes peering from left to right and back from over the top of his shield, he had the robots' full attention and they were finally close enough. Their individual swings not enough to budge Kuhaku, they all raised their arms at the same time in the hopes that a concentrated attack would bring him down. Giving Kuhaku the perfect moment for his counter. Quickly rearing his shield back, he swung his left arm wide and hard. Smashing his shield across the bodies of the robots and throwing their attack off balance, giving him the few seconds he needed for his next move.
Sheathing his sword into his shield, he removed the combined weapon from his left arm and grabbed the handle of the blade. Swinging it behind him, the weapon rapidly disassembled and reassembled itself into his Great Axe. Announcing the finish of its assembly with a hiss of air, Kuhaku grinned at the robots who were beginning to reorient themselves. Axe reared back, he tightened his grip as he slowly lifted a single finger. With an audible cha-chunk, the Axe had loaded the vial of dust from before. The robots looked at each other, confused for what was coming next. Kuhaku yelled out to Gren.
"Coming your way!" and his finger pulled the hidden trigger within the handle of the Axe.
With one loud thunderous BOOM, the vial of dust from within the axe was discharged. The head of the Axe erupted in blue flames and propelled Kuhaku's swing in a powerful, wide arc [BLAST SWING]. The large axe-head smashed through the robots all at once, cleaving their torsos in two. With the extreme force and momentum from the explosive swing, their bodies were sent flying back towards Gren though heavily damaged and some in near pieces. As they flew in midair towards Gren, Kuhaku's eyes gleamed from the metallic wreckage of their parts, still wearing his signature toothy, white grin. The blue flames on his axe dying out, a small metal slide near the hilt shot back and ejected the spent vial of dust, returning forward with an empty chamber. The empty dust vial clinking and clattering across the ground.