jack comes off as overly serious and has a hard time opening up to people, even his own family. he's always been one to be content in the background going unnoticed, which probably works since his sisters are a little on the dramatic side. he has passion in there somewhere if he trusts someone enough to open up or they can drag it out of him. he's a veterinarian who secretly drinks more than anyone knows or cares to pay attention to because he's the one listening to other people's problems. i'd be open to either of those lines if you think he'd fit.