Back again with a new idea, this time regarding that buff wolf we see in the artwork of the gallery. If a story about him has already been made then you can just ignore this idea.
The idea for this wolf character to become Arma's rival during the quest by being jealous of her. He would be motivated to prove to the king and the kingdom that Arma's is nothing more than a sl*t by slaying the dragon before her, to show Arma as a fake to everyone. He could appear several times to sabotage Arma on her journey, like collapsing a tunnel that would've allowed her to skip a stage, separating her from Gerbera, or even stepping in to fight Arma himself. As a rival boss, he would operate as a stage-wide boss fight with three battle areas to encounter him at, and be very difficult each time. Each time you take his health down a certain percentage he would retreat to the next area, allowing for Arma to recover between battles. He would also include two victory animations and two defeat animations when you win or lose to make him a unique encounter as he would be the only enemy who can do that. While fighting, this wolf character could taunt both Arma and the player by saying things like, "You have no skill, only sexual bribes." or "The only reason you're here is because people want to see your tits bounce, pathetic!"
Just a little idea to help with the story building, but like I said if you already have a plan for this character than you can just ignore this.