Karen's children

Up to the user what the characters personality is but Zach has a cheeky prankster type personality, Katie has the sweet quiet girl personality, and Cory is basically a cat version of Mario smg4

This takes place in YouTube web series smg4,

One of the characters, Karen katphish. has three children, Zach, Katie, and Cory

Y/N had paid the mafia to kill Karen katphish and they actually succeeded

After Y/N ratted the mafia to the police (they didn't get sentenced because they ratted on the mafia, that's how the justice system in the mushroom kingdom works) sending the mafia to a maximum security prison for life

But now Zach, Katie, and Cory have no one to look after them so you decide to get legal custody of the kids and sell your old house for 30 million dollars (someone actually bought it cuz it's the smg4 universe) and buy the katphish home so they didn't have to move to a new environment