Lyla

Lyla is the ex-girlfriend of Brandon Henry.

History
Lyla came into the practice with her boyfriend, Brandon, who had a sore throat. When the sore throat turned out to be throat cancer caused by HPV, Lyla blamed herself. She hadn't told him she had the virus because she didn't think it could hurt him. Brandon said he didn't blame her, but when Brandon was told he'd need a surgery to remove part of his jaw, she left him, saying she couldn't look at him every day and know that she caused it.

Romantic
She was dating Brandon Henry. They met when they were lab partners at school. He was planning to propose, but hadn't gotten up the nerve to ask her. When he was diagnosed with cancer, she left him.