Seems to me Naomi’s paternal grandparents were a Japanese male and a Haitian female. They had her father who married a Japanese female. ...Thus, her surname is Osaka and she is 1/4 Haitian.
After reading #50, I found that my guess at Naomi’s family history was wrong. ...Thanks for doing a little research, CP, as the results present a twist I didn’t contemplate. I was just focusing on her last name.