Who is Gerald in hey Arnold?

Gerald Johannsen is a fictional character and one of the main characters of the animated television series Hey Arnold!. Gerald is Arnold's best friend and one of the most level-headed kids in his class. He is known for his intelligence, maturity, and caring nature, and is often seen as the "voice of reason" among his friends. Gerald is also a talented artist and photographer, and is frequently seen carrying a sketchbook or camera. He is a kind and caring friend, always looking out for Arnold and the others, and is often the one to come up with creative solutions to their problems. Gerald is also a loyal and supportive friend, always there for Arnold and the others when they need him.