Lufel (codenamed "Cattle") is an owl appearing in Persona 5: The Phantom X, a Chinese-developed mobile gacha game spinoff. In that game he serves as an ally and plot device similar to Morgana, a nonhuman character with prior expertise who guides the protagonist ("Wonder") through the process of becoming a Phantom Thief and infiltrating Palaces.

The name "Lufel" is possibly derived from clippings for "Lucifer" (compare ルシフェル → ルフェル and 路西菲尔 → 路菲尔), but prior to official English materials Lufel was known by a few different names.

• Early in the game's lifespan and immediately after its reveal, "Cattle" was the only authoritative English name.
• Some communities used "Ruferu" as a direct transliteration of his Japanese name.
• Some communities used "Lufer", from the theoretical etymological origin of "Lucifer".
• Machine translations from Chinese incorrectly gave him the same name as Monkey D. Luffy, based on the similarity between 路菲尔 (lù fēi ěr) and 路飞 (lù fēi).