Fantasy World - 16 - Dance The Night Away (Battle Against Adereina)
When she first arrived the other girls were wary of her, and they were right to be. She is physically the strongest and fastest member of the team. She isn't the worlds top Idol for nothing you know. Adereina quickly initiates a fight with the main character unknowing to him and the rest of the party just to test out how strong he's become, but does not plan on holding back at all. While the other members of the party try to stop her, they are quickly overpowered and beaten up. While the other girls are strong due to their powers, they are nothing compared to her physical capabilities. She tells them to sit back for a while and watch. Imagine Medaka from the Medaka Box series with just her physical strength and speed, and you have Adereina.
Joins the party after you win. If you win that is lol. Possibly one of the hardest fights in the game.