Ferb Fletcher is Phineas Flynn's step brother and is British. Ferb bares a strong resemblance to his dad Lawrence especially the "F" shaped head. Ferb is actually not shy like most would assume he's actually very courageous and clever. Ferb is a mechanical genius and has built many things such a roller coaster and a rocket ship. Ferb doesn't speak much but when he does say something it's usually something smart.