Ruth O'Leary is the sister of Benjamin O'Leary.
Ruth came to the hospital with her brother when he needed to have a brain tumor removed. The tumor was in a place that affected his impulse control and it made him say offensive things to and about people, including Ruth. Despite this, she stayed by his side, though he ultimately died in surgery.
She stood by her brother, Benjamin, after he was diagnosed with a tumor that made him say everything he was thinking. She informed the doctors that they had to tell him directly when he said something offensive, because he didn't understand sarcasm or irony.