[h3]Pthumeru Yharnam layer, the Old Labyrinth[/h3]
[h3][color=red]Arrayah, the Profane[/color][/h3]
As soon as the dual blast of Farren's blunderbusses, followed by Ophelia's arguably late and unnecessary command to initiate combat, all the Hunters started to move at once to assault their monstrous adversary. The first attack to hit would be the ranged blast from the Holy Moonlight Sword impacting Arrayah's torso, erupting into its usual burst of arcane energy... and barely leaving a scratch. Unlike previous engagements where its powers had been obviously destructive, even if the target regenerated the damage rapidly, with Arrayah it looked as though the damage was negligible, doing little more than lightly singing her skin.

Gerlinde started moving as soon as Farren fired his weapons, dashing swiftly toward the fiend while feeding her Horn of the Old Lords a quicksilver bullet and quickly applying its power to her threaded cane... only for her to blink confusedly, albeit not enough so to pause her charge. Whereas the other time the others had seen her apply the horn's fire they had been deep red, the flames that now sprung from her cane were bright bluish white instead.
Ignoring this for the time being since they had more urgent matters to contend with, Gerlinde transformed her weapon into its whip-form and immediately began her barrage, lashing wildly at Arrayah's torso... only to find, like Ophelia before her, that her weapon almost did not even leave a mark. The flames did not seem to burn it and the serrated blades seemed to fail spectacularly to do more than superficial damage. Even so she continued unabated, since they still had to fight and the cane was her only weapon besides her pistol. She was doing small bits of damage, just... not much.

Meanwhile a far more daring attack was being undertaken by Farren, who opted to get a better angle to strike by getting on top of Arrayah's hind body. The numerous mismatched appendages there did not seem to react to Farren at all, even when he touched or downright attacked her body, making it seem as though their movements were entirely random and mostly autonomous. Even so getting up on the body was immensely dangerous with so many weird limbs flailing about uncontrollably. And indeed, he paid a heavy price, as not only did he get kicked by a small hoof and clawed by a stray cat-like paw, but a somewhat humanoid eight-fingered hand even managed to incidentally nick him with an old one-handed falchion; not enough to cut deep, but enough draw blood and do a relatively small amount of damage.
But now that he had attained this questionable but potentially advantageous position, Farren had the opportunity to continue his assault with his two Blades of Mercy. Quite interestingly he would find that his two weapons performed very obviously differently against this creature; whereas the regular Blade of Mercy cut smoothly through Arrayah's flesh as one would expect them to, the Effigial Blade of Mercy seemed to struggle far more, as though its edge had blunted. Any momentum in his swing with the effigial weapon seemed to be halted as soon as it hit the creature's hide, and he would be able to tell that he needed a disproportionate amount of force to cut through her at all.

Finally Torquil arrived as the last of the Hunters, reacting slower than any of them, but nevertheless expending the stamina to to accelerate into a sprint that pushed well past the speeds his body would have been capable of when it had been human. He ran right up to what would have been Arrayah's right hip in terms of human anatomy, right against the wall, and as soon as he arrived put all of his own momentum into a two-handed swing with Fulmen. It hit hard and true into the hideous mutant's flesh, deforming it and jostling her with the blunt impact, so he felt encouraged and hit her again, his own body swelling with his Old Blood-enhanced strength.

But unfortunately the party did not have long before Arrayah did indeed begin to “stir”. It only took three seconds before the front-arms that had hung limply down her sides suddenly raised into the air, only for all three of them to slam forward and into the wall, with the left one digging its claws into the stone, the strong right one plunging the the Profane Abyssal Blade into it, and the thinner right arm simply clutching at it with its fingers as best as it could.
Farren dismounted with one last heavy bit of damage with the more effective of his Blades of Mercy, but by then it would already be evident that Arrayah was doing something very strange. Rather than push away from the wall she seemed to hug it intensely... only for the hind body to lift off the floor slightly – the weight of this ten meter long mass of flesh and limbs resting entirely on the front body anchoring into the wall – and curl away from them to Arrayah's left over the course of just a second.
Then, like the arm of a catapult releasing its tension, the hind body came shooting [I]even faster[/I] back to the right, scything across a huge swath of the cave. Gerlinde tried to quickstep away, but she was too close; Arrayah's hind body was long enough and its swing fast enough that Gerlinde could only manage one quickstep, and that was not enough to get out of its range. It caught her and slammed her into the wall with another massive crash.
Torquil, who had been standing even closer and reacted much more slowly, predictably also did not manage to get away... though ironically his closer vicinity to Arrayah meant that he only got hit by the “base” of her hind body, which moved much slower and with less force than further out toward the tip. Consequently he got shoved and squished a little, but did not suffer anywhere near as much damage.

Farren, with just one quickstep, also would not escape and got hit by the full force of the attack.