Rosalia Rosselini is a young girl, CR-S01's adopted sister, and Maria Torres' friend. She was the natural-host to the Rosalia Virus, and was immune to its bad effects. She was killed 3 years ago prior to the game's setting by Sartre. During the pandemic Naomi and Maria go to mexico and make an antiserum from her blood, that destroys the Rosalia Virus. Maria is the only one that could see her spirit as she tried to warn her, saying something about a "beginning", at one point she also warned Maria to run right before the school bus accident at the mall where she, Tomoe Tachibana, Hank Freebird and Gabriel Cunningham were in.