Hi there sorry to bother again,judging from official art of chapter 5 and what happens in the chapter, she has armor and protection on this arm to prevent her most likely to get burn by the fire of the demonic katana
Pretty sure it's Haru. She uses a grenade launcher in game, gardens as a hobby, and her father's dungeon is themed around sci-fi B-movies which all fits with this design. The title which can roughly translate to "noble daughter" may be a reference to her status as heiress to a major company. It looks like a design for a hypothetical Shadow Haru boss for a Shattered Glass-style AU
Not entirely sure if this is original or Haru from Persona 5 as there is nothing in either the tags or description that identifies her. Could be a fully original character. And if it is Haru, I am not sure if the outfit is based on anything or is fully original.
