Ferb Fletcher

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 yp create and invent gadget or even weaponry to assist the Society's battling out the Orgs.

they last seen they working on a superhero costume with few additional ability to make them have superpower, intentionally, to help out the Ultimawielder.