Writing an edgy character. How much is too much?

My dark Iron dwarf is one of my more edgy characters. Her family lived in the Highlands among the Wild Hammer dwarves after leaving Shadowforge to avoid their on-going corruption. They were then captured and killed by the other members of their clan for being traitors. Hilde Cinderhewn is trying to become the last of her name by killing off every member of the Cinderhewn Clan so that her parents are avenged.

Is this too edgelord? Should I dial it back a bit? You tell me!