After she died in Butterfly Incident, her spirit came out from her body and become wanderinh ghost. She'll guiding you as new SKK on Girls' Frontline, and giving tips. As long your are good SKK she won't haunting you, for bad SKK that resembling her former commander she'll become vengeful ghost and haunting or torture you forever. UMP40 only appears as normal ghost when night or meeting with UMP45 and as vengeful ghost she'll appears at night or your nightmare dreams, so don't mess with her.