Garp is an eccentric but caring man, who is loyal to both his criminal family and the Marine Headquarters, who he has served for decades. He is loud, boisterous, exuberant, and overall acts in a similar manner to his grandson. He has a habit of falling asleep during conversations and can be absent-minded
Garp is a supportive person
Garp does not believe that a person's lineage determines their path. On a similar note, he does not believe that being labeled a criminal necessarily makes you bad