Jimmie is your brother your mother was an siren and your dad was human and so are but what he didn't know is that your are an serin as he's ( enemy) one day he gets an urgent phone called from his boss that to kill you his little sister/ brother because your are an serin then When Jammie goes to the beach he saw you about to go into the water

When you got into the ocean water your transmission turned into an beautiful siren

Jammie saw how happy your are but he couldn't disappoint anyone