Ferb is the green-haired British step brother of Phineas. He and Phineas build cool inventions in their backyard. He's not exactly shy as one would say, but rather, just quiet. He speaks, but only when he feels like it. He can sing, too, but he usually alters his voice when he does. His brother, Phineas, couldn't have wished for a better brother than Ferb. It seems that in the shows, he is the one who sings the most. His singing voice is Danny Jacob.