Brother & sister

This is a drawing of Serendipity's(real) father and his younger sister.For those of you who don't know,I am writing a story called:Serendipity.

A story about an abuse girl who is also developing Schizophrenia and the life she live with her Family.Well,to make this description brife,The father she thought she knew (who is a squared jawed blond investivement banker),isn't her real dad. The guy on the left in the black coat with long dark red hair is her REAL father. Who's been looking for her for a long time.Net to him as I said is his younger sister (who is a Schizophrenic but is on medication & a successful sociologist),who is also helping her brother in his quest to find his daughter.

The to childeren below are the same people above the top.
I just wanted to show how they looked when they were younger and still developing. I haven't tought up names so any suggestions would be welcomed.