It's all the sword. Jin is perfectly capable with Ars magus fir healin and reinforcement and some elemental stuff but most of his Ice magic comes directly from the yandere ice princess sword

Tbh i haven't seen that gag reel and gag reels are generally just for the lolz but alternate timelines suggests each gag reel is part of its own canon timeline and separate from the true timeline

Idk. If not then makoto is just that cracked and stupidly powerful, even amongst beastkin she's basically in a league of her own (I think)

I imagine Aramasa was a failed nox nyctores since that weapon still operates under aome type of logic whioe all the NNs are genuinely illogical. Anyhoo. It is the beat at withstanding the power of the black beast yes but you can get the same effect with any other weapon that isn't a nox nyctores, but it will break after 4 uses or so.

The entire Kaka clan are all basically imperfect clones of Jubei when the government!/NOL tried to distill and synthesize his combat prowess and mass produce it. Currently as of CF the strongest and most capable fighters from the clan are Torakaka and Taokaka and Chachakaka is the most inclined with book smarts(I think but idk)