[AtomicBeast1954]

Yes, I agree that Geiz switching back and forth with allegiances is a huge problem but I think this episode was more than a wake up call but a horrifying revelation to him.

If Tsukuyomi did cause the bus crash, that means she murdered Sougo's parents and possibly in turn lead to Sougo rise as Oma Zi-O and Geiz's part is of his inactions. To learn that you and your friends' paranoia and selfishness is the reason your life is crap is something they can't handle. Not to mention if Sougo ever finds out that his supposed closest friends ruined his childhood, there will be Hell to pay.

There, Geiz Revive fights Zi-O due to a combination of fear of Oma Zi-O's rise and as mercy to atone for dragging Sougo into the mess in the first place.