Nanana is the ghost haunting Juugo's room, trapped there for a decade since her murder. Before that, she was an exceptional student known for her adventurous spirit—the kind of person who helped establish the Nanae Island project alongside six other gifted high schoolers, a group that became known as the "Great 7."
These days, she's basically a NEET, spending her afterlife playing video games, browsing online, and eating pudding (seriously, that's the only food she can consume). She doesn't seem to mind the routine, though the loneliness definitely catches up with her—at least until Juugo moves in.
Nanana's Collection is what most people know her for: a massive hoard of artifacts and treasures she accumulated during her adventure-hunting days. Some of the fortune went toward funding the island project, but the rest she stashed around the island in various hiding spots. The Collection includes all sorts of rare and supposedly magical items that people have been hunting for ever since.
Content compiled by AnimeList.moe from publicly available sources.
