| Character Profile | List of appearances |
Jem Costello is the daughter of Carl Costello, the half-sister of Riley, Seth and Jason Costello, and the ex-fiancé of Gilly Roach. Jem moved to Hollyoaks with Gilly in March 2010 after saving her from a shark in Thailand.
Biography[]
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Residences[]
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Employment History[]
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Background Information[]
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