<P> William eventually succumbed to his cancer during a road trip back to Memphis with Randall . Prior to his death he left a letter to Randall's girls, asking them to plan a fun memorial for him . He also sent Beth a postcard from Memphis, saying goodbye and calling her the daughter he never had . </P> <P> Miguel Rivas, portrayed by Jon Huertas, was Jack's best friend and is Rebecca's second husband . Miguel was originally married to Shelly, before they divorced . While it originally seemed that his marriage to Rebecca happened shortly after Jack's death, in season 2 it is clarified that the two did not get together until at least ten years after Jack's passing . Miguel was initially disliked by Kevin, until Miguel told Kevin how much he is like his father . </P> <P> Miguel told Beth and Toby one day, when Kevin in rehab was meeting with "immediate family", that he felt like a real outsider compared to them and the Pearson family . When Kevin got out of rehab and stayed with Rebecca, Miguel was protective of her after she was hurt by Kevin's arrest, and by Kevin criticizing her in his rehab session with the family . Kevin asked Miguel if he was in love with Rebecca when Jack was alive; Miguel said that idea never occurred to him because everyone saw Jack and Rebecca as one entity rather than two separate individuals . But he stated that he loves Rebecca now, and is not going anywhere . </P> <P> Sophie, portrayed by Alexandra Breckenridge (modern day), Amanda Leighton (ages 15 - 17), and Sophia Coto (age 10), was Kate's childhood best friend and Kevin's childhood love and his ex-wife . Kevin moved to New York and reconciled with her, after his relationships with Olivia and Sloane ended . Their relationship initially survived the distance when Kevin was in his movie in L.A., but Kevin broke up with Sophie, admitting that he couldn't be the man that he wanted to be for her . When Kevin got sober, he tried making amends to Sophie; she just wanted to remember Kevin when they were younger . </P>

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