After graduating from college Arnold moved away to reunite with his parents in San Lorenzo, where he remained for 5 years. He returns home when he receives news that Grandpa Phil passed away. With no other other tenants living in the boarding house other than Grandma Gertrude, he decides he is more needed in Hillwood. Arnold works closely with children as a child psychologist. And, according to Gerald, Helga is noticeably more affectionate to Arnold now.