Lumi

She is a Mass-produced Nikke found exploring the Snowfield Hot Spring. Though she's taciturn in her speech and appears to have amnesia, Lumi seems to know something about the legends swirling around the resort. She was later seen by the squad at night wandering in a room, where she heard haunted noises of a girl crying for help, eventually causing her to black out. When Lumi was human, she used to live at a hot spring resort (implied to be Snowfield before it was abandoned) with her sisters Lua and Lena following the death of their parents. The three wanted to fulfill the legends around the hot springs, believing in the rumor it would make them happy. However, for some reason, Lua has disappear, and Lena became increasingly unstable. In the end, Lumi was ambushed by a Rapture one wintery night. Even after becoming a Nikke, Lumi found herself hating the cold of winter... Despite this resurgent trauma when Lumi found herself back at the resort, her memories began to be painted over with new experiences. The time she spent alongside everybody, helping them fulfill the legends, pieced her broken heart back together. Removing her goggles to see Snowfield with clear eyes, Lumi expressed her wish to remain at the hot spring, prompting Ludmilla and the protagonist to request the MP Nikke become a member of Snowfield's staff.