How likely that sisters have similar personality?

No.13990188 ViewReplyOriginalReport
Geneticists, help me out!
Years ago I met a girl from Kazakhstan when I was an exchange student at KAIST in South Korea for one semester. I became friends with a tight knit group of 7 foreigners. We studied and hanged out together and it was fun. This girl though, was a heart of the group. I swear, every single man who knew her was in love with her, including professors, phd students, local chaebols, etc. etc. Looks wise, she was cute, 7-8 I would say, but she was 10/10 personality wise. Very kind, feminine, honest and just had that naive, relentless optimism and curiosity. Straight A student (Chemical Engineering), great cook, played violin and was girl's table tennis champion in the university. Her room was always perfectly clean and her fridge always had cakes and snack that she prepared... I had no chance though, she had boyfriend of 3 years and I learned later that they got married. fast forward 8 years. I had several gf's in this time, but she set a very high standard for them. I just can't deal with entitlement, laziness and naggines of women. But what can I do, nobody remotely comes close to her? Here is what's happening. I got a job offer from Korea. I wasn't considering it, but by accident I learned that her younger sister is studying Chemical Engineering at Seoul National University. Scientifically speaking, how likely it is that she has similar personality as her older sister? I'm seriously considering moving to Korea and "becoming friends" with her.