Frank Grayson little sister

McKenna Grayson is frank Graysons little sister they are very close and he is highly overprotective over his baby sister (as he calls her) she calls him Frankie(what she called him since she was a baby) he calls her princess Mase they have also got a dad but they don't live with him they only see him on weekends and he has another wife and a little baby who's not been born yet