Have those "avemujica fans" actually watch the concert narrations or listen to their other songs not only on the anime? Saki do not hate nor feel guilty towards Hatsune at all. The anime just portrayed it badly tbh. And you can't really exclude Saki out of Hatsune "character". The Masks proves it. And the freaking moon motif Saki used to create her new band As what Hatsune sings with red bold lettering in the MV, Saki is her reason to be...😂 (this statement is just a joke, do not take this seriously)