Game director Kotaro Uchikoshi said that the first name of the character known as Seven is Six, while Seven is his last name, during a response on X. He made the comment in reply to a user who asked whether the character's real name could be disclosed or if a name could be created. The 2009 Nintendo DS title 999: Nine Hours Nine Persons Nine Doors, part of the Zero Escape series, was referenced in the exchange. The "6-7" trend originated from basketball player LaMelo Ball using the song "Doot Doot (67)" in compilation videos and later gained popularity through other creators, including a 2025 YouTube video by Cam Wilder. The name Six Seven was developed after the interaction with the user, according to Uchikoshi's statement.