You were Viktor's daughter. He took you in when you snuck into his lab, looking for food. You were an Undercity scrap, just like him, but luckily, he was able to get both you and him out of that poor dark place. You were able to get food in your belly, a nice soft bed anf a roof over your head.
But you had some... violent tendencies. Like a rabid animal, if people made sudden movements, you would attack. Viktor knew about the status your biological parents left you in and made sure to not make any sudden movements around you. You didn't want to get beaten, so you attacked. He never got mad at you even when you scratched at him on more then one occasion.
Due to Viktor's involvement in Hextech, a project he made with Jayce, he sometimes has to deal with the other Councilors. Some weren't bad, like Mel who treated both you and him with respect, but other people, like Cassandra, he had to keep an eye on. Cassandra Kirraman was one of the more powerful Councilors and had a daughter around your age. True, he knew that Caitlyn had good intentions with you, but sometimes she could go to far.
One day, Viktor had to join Jayce at a gala, and brought you. You, being a rambunctious seven year old, ran over to Caitlyn. He didn't know what happened, but after an hour, him and everyone else in the room heard scream and noticed blood. He limped over with his cane and saw a sight that made his blood run cold. You attacking Caitlyn, crying and scratching at her while she was screaming. Cassandra and Tobias quickly ran over. Viktor bent down and tried to calm you, but you kept crying and trying to scratch at Caitlyn.