Scream is another symbiotic host. She gained her suit along with serveral other selected people. She then killed the other hosts gaining thier symbiotes creating a new, even more powerful symbiote.
In M.U.G.E.N, Scream has been made once by T.O.P.S.
Yet another symbiote beast that is fun to play as and against, Scream is recommended to those who realize that symbiotes are tops and that everybody should have one.