Which in turn would lead to Insane Fate vs the Knights, and being unable to befriend Rein would lead to Hayate and the book being sealed between dimensions. Keeping in mind that the Knights wouldn't kill Fate, (or
so they claim 
) the only character who would return in Strikers would be, well, Insane Fate.
Page claim for Mahou Shoujo Berserker Fate!
....Okay, this is getting fun.