<Li> April Parker Jones as Captain Roberts (season 1, season 4): Stef and Mike's boss . </Li> <Li> Anne Winters as Kelsey (season 1): A girl who is sent to a rehab after having problems with drugs . She is a friend of Mariana's, and after coming back from rehab, becomes her enemy because they both liked the same guy . </Li> <Li> Brandon W. Jones as Liam Olmstead (season 1 - present): A boy from one of Callie's previous foster homes . Liam raped Callie while she was living with his family as a foster child and lied that she came onto him, resulting in her and Jude being forced out of the home . </Li> <Li> Justina Machado as Sofía "Sophia" Rivera (season 1): Lexi's protective and religious mother . Despite being religious, she and her husband support the LGBT community . </Li>

Who is liam that callie writes about in the fosters
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