There's so much going on that it's only by chance that Ib sees Sephiroth get pushed back by the shock wave. Her first instinct is to try to reach him, to see if he's okay, but there are far too many soldiers around. Not to mention the spider robot. She might be able to do something about the soldiers though...

But they said to use lightning. And this would be ice. But it might be the best thing she has. And situations like this? This is why she picked up the summoner job. And maybe enough ice would slow that thing down. She closes her eyes, concentrating, calling for aid from the icy goddess.

"Shiva!"

She feels the cold wind rushing in, accompanying the Diamond Dust.