She is 13-14 yo, and she is a fast runner since her trauma as a kid being taken hostage and slice by a knife in her forehead. She started running she sees that she's being chase so she became a trackfield championshio but still she is a coward. She knows that her family is surely dead because 3 days has passed since the apocalypse started. The apocalypse consists of monsters with overwhelming strength and a regeneration but they have weak spots. She's in a subway since then. 