What is the name of Dexter's sister?

What is the name of Dexter's sister? Dexter's sister is named Debra Morgan.

Debra is Harry and Doris Morgan's biological daughter and Dexter Morgan's adoptive sister. Harry brought Dexter into the family after rescuing him from the shipping container where Dexter had witnessed the murder of his mother, Laura Moser. Debra grows up seeing Dexter as her real brother, even though they are not biologically related.

Portrayed primarily by Jennifer Carpenter, Debra begins the television series as a Miami police officer working in Vice and determined to transfer into Homicide. Her ambition is strongly influenced by Harry, a respected Miami detective. She eventually becomes a homicide detective and later rises to lieutenant.

A major source of drama is Debra's changing understanding of Dexter. She initially believes he is an unusually helpful forensic analyst, but discovers his secret life near the end of season six. The novels spell her name Deborah, while the television series uses Debra. Hannah McKay, Lumen Pierce, and Rita Bennett are important characters, but none is Dexter's sister.