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Ed was the unnamed child in Balrog Street Fighter 4 endings and later a minion of the Shadaloo organization in Street Fighter 5. He was created as a spare body for M. Bison, but he got kidnapped by Seth who placed him in the S.I.N.'s laboratory.
Street Fighter 4
He first appeared in the headquarters of SIN and was found by Balrog who took him away because he saw the shape of Shadaloo symbol on his hand and thought that he could possess valuable secrets.
Later Balrog questioned him about his abilities, however Ed responded that he is powerless on his own, Balrog responded to him that he is useless but he mighty be useful later on.
Street Fighter 5
Here he is a valuable minion of the Shadaloo organization which trained him and evolved his Soul Power into the Psycho Power.
He meets Charlie which asks him where Bison is, the latter showcase his Psycho Power and taunts him for being a dead body, before he could attack Charlie, he is joined by F.A.N.G who fought with him and lost, after he stated that he was annoying, he escapes thanks to F.A.N.G smoking poison.
He later reappears along with Balrog in the latter story prologue, here they are confronted by Urien who is interested to give them a high quantity of money in exchange for their work for him and all the data and informations about Bison Operation C.H.A.I.N.S, but they are interrupted by Necalli who was seeking to devour strong souls. After Necalli was defeated by Balrog, Urien concluded the affair.
In the main story mode Ed used his power to stole a chess piece from Zangief, but it was later retrieved by R. Mika and Ibuki. After the fall of Bison, he can be seen smiling along with Balrog while watching the Shadaloo Base being encased by the flames.