Jillian was a masseuse whom Phil and Claire met on their flight in "Fight or Flight".
Overview[]
Jillian introduced herself as she was to sit next to Phil on the flight, when there was another man in her seat, because he sat in the wrong one. After he headed off to his right seat, Jillian sat down with Phil and Edward LeGrand, a professional magician. She had fun watching Edward's tricks and during one of his acts, he asked her what was her initial for her middle name and she answered "'C' for 'Catherine'". She was later seen giving Phil a back rub as Edward was performing card tricks, until Claire came and found out Phil lied to her and blew her off, so he could keep having his fun while she suffered in first class from her neighbor's obnoxiousness.
Later, when Phil was in Claire's seat, he said that Jillian was waiting for Claire in his seat to give her a little back rub, and she soon walked off to Phil's seat to have some peace and quiet, where Jillian presumably gave her a back rub.