Several of the Phantom Thieves' weapons are named after real-life, religion, history, mythology and literature:

• The protagonist's Paradise Lost is named after the John Milton poem of the same name, which describes Satan's rebellion against God and the fall of man.
• Ryuji's Mjolnir is named after the mythical hammer wielded by Thor, the Norse god of thunder, while his Megido Blaster is named after Megiddo, a ruined ancient city located in northern Israel said to be the site of an end-of-days battle.
• Morgana's Claoimh Solais is named after the Irish sword of light, while his Sudarshana takes its name from the discus Chakra used as a weapon by the Hindu lord Vishnu.
• Ann's Naraka Whip and Dainaraka Whip are named after Hell in Hinduism and Buddhism; "Dainaraka" is prefixed with the Japanese word "Dai" meaning "great".
• Yusuke's Usumidori is named after the pale green sword wielded by the samurai Minamoto no Yoshitsune, while his Providence is named after the concept of divine providence.
• Makoto's Gordios is named after the Phrygian King Gordias, while the Judge End is named after the concept of the Last Judgment, where all rational creatures are evaluated at the end of days by God.
• Haru's Fleurs du Mal (French for "Flowers of Evil") is named after a volume of French poetry by Charles Baudelaire, while the Yagrush is named after a weapon crafted for the Caananite god Baal.
• Akechi's Hinokagutsuchi is named after the Shinto god of fire, who burned his own mother alive at birth, while his Ancient Days is named after the "Ancient of Days", a name for God used in the Hebrew Book of Daniel.
• Yoshizawa's Sword of Sinai is named after the biblical Mount Sinai where God gave Moses the Ten Commandments, while her Sahasrara takes its name from the Hindu Crown Chakra that controls one's pure consciousness.