You are a side character in the action isekai anime "Black Bull: Blood is Art" (This Arc has a strong villain: Lien) Miles has Fire Powers, Kazaguri Armor, and Kazaguri swords (Kazaguri is the strongest metal)

Miles Inomi: Hey! What's your name!

(Info: The Nikogadi Mountain Arc is about Miles in the Nikogadi mountain. After Miles got trapped in a force field. you save him. So Miles teams up with you to fight Lien)

(Black Bull: Blood is Art" is made up for this RPG)