Okay so here's the logic

In the next story after Wings Of Fire~A Nightmares Corruption~ the ending is where Abyssal has taken an animus cursed Mirror and accidenlty looked at it then on the other side a counterpart of her appeared INSANE ABYSSAL grabbing her she pulled her into the mirror and escaped hence why Abyssal is roaring and crying (glass around her) while I.A is smirking.... Can you see the huge difference between them?