Ferb Fletcher is Phineas's green-haired, intelligent but laconic stepbrother from England .
Ferb and his stepbrother Phineas Flynn spend their days during their summer vacation having fun. They are featured in every episode's A-Plot constructing large scale inventions or taking part in other outlandish activities. Ferb, an engineering genius, allows Phineas to do most of the talking for the pair and is described as "more of a man of action," by Phineas, which makes him more of a plot device than a developed character. Ferb is more likely to sing than speak, but most often has a one-liner in the episodes.
Ultima role[]
Ferb and his brother, Phineas, often help the Geniuses to create and invent gadget or even weaponry to assist the Society's war against the Org.
He seems able to handle his own, seeing how he been attacked by an Org member and carefully used a laser gun and assault rifles, better than his brother.
He and Phineas are last seen working on a superhero costume which grant a few additional ability to give the user (Most likely them) superpowers, intentionally, to help the Ultimawielder.