Theresa is Wynter's swimming instructor, and a college student. Wynter meets her when Caleb takes her for her first swimming lesson in March 2014, and notes she's pretty with an open friendly smile. She hopes Caleb will notice.
Jesse works at the pool as a lifeguard and knows if Theresa is single but won't tell Wynter, and says Caleb won't date her teacher in any case.
Theresa appears in 04 Lost Melodies.