Can someone help me in giving a few families some interesting back stories?

I love the Chu family story. Coincidentally, Melissa became a doctor in my game too (and later an astronaut). I also like NRowe's idea of Yuta using Sue as cover. I like to think Sue is blissfully oblivious (bit naive, sees the best in people) to Yuta's less than legal shenanigans and he can't help but find himself starting to like her for real.