I know it's not "arcane" but whatever, call it weekend at noxus for all I care.
I did my best with the video, the outfit is as good as I'm going to get it. Trained on top of the katarina league token so we'll see how it goes.
I wanted the silver broken mask more than anything.
TL;DR
Character:
katarina \(league of legends\) silver mask, red hair, hair over eyes, ponytail, dramatic eyeliner
Outfit:
blue tunic, multicolored clothes, turtleneck, ornate clothing, gold trim, bare arm, blue arm, red pelvic curtain, gothic style