He and Brenda had a close relationship as children but he was diagnosed with bipolar disorder and hospitalized. When released, he showed up at her house unnanounced and later attacked her, attempting to give her a tattoo in honor of a book character they both liked as children.
He was re-admitted to rehab but Brenda was not too happy when he was released to spend Christmas Day with their mother. However, in spite of this, they care a great deal about each other.
When Brenda dies, he is shown by her side talking to the doctor.