Nine is something that should have never existed according to her own words, she used to be a normal girl with no memory of her parents, living her entire life inside a lab being subjected to many experiments with the goal to create biological engineered cat girls, she ended up failing greatly, to the point she ended up constantly sick due to the many chemicals injected to her body, because of that she was given an gadget created with the purpose of keeping her alive for as long as possible, whatever she ends up blacking out, the gadget gives a electric shock that reset her heart rate

At some point she was able to escape the lab while there was a meltdown happening only to realise the outside world is even more unforgiving, yet she refuses to return to that cold dark place she used to live, so she makes up her mind and decides to live through this hell as a runaway