Mephistopheles (メフィストフェレス) is a supporting character in Fate/Grand Order -MOONLIGHT/LOSTROOM-. The series' music includes "Fate/Grand Order - "Shikisai" | ENGLISH Ver |", "「Prover-milet」見證者 絶対魔獣戦線バビロニア ED2 FGO巴比倫尼亞 ED2".