Fate's Bane

During the tragedy of the Fuyuki City fire, a new survivor, thrust into that dimension, appears. As the infamous wielder of the kaleidoscope is watching, he decides to switch out Shirou with this newcomer. With a different character in, how will the Fate universe handle this? One thing is for certain, Angra Manju is fucked. OP (in comparison to Shirou), grey, multiple servants, ect