Alright, so to be clear, the characters in Rift Warriors X are not pulled from other IPs and stories that exist in-universe, they were made for Rift Warriors by the game's own creative team, with each character being based on a specific place and time period in history. More Soul Calibur or For Honor than Smash Bros. or Multiversus. Is that the correct understanding? Sorry for the confusion, I sometimes laser focus on the wrong part of a sentence.

My initial thought was to make a dullahan with a claymore, fire/will-o-the-wisp powers, and a bear trap in place of teeth, but if we're going for characters more grounded in history than fantasy, I might go for more of a queenly lady-of-war who summons different types of soldiers.