Talk:Celica Ayatsuki Mercury/@comment-76.241.143.16-20140103072108/@comment-16571503-20140103080449

What Celica's ability does is that it makes the seithr(particulate programs) stop moving and thus disabled. Now, since there is so much seithr in the world Kokonoe has put limiters on Celica so that she won't overwork her ability. The only exception of her power that Kokonoe hasn't weaken is her power to make the Azure Grimoire useless.

Now, the only opponent Ragna had with Celica near him was Azrael (who more or less fight not using ars magus), and during the climax Relius had opened all that gates in the world and thus there is simply to much seithr for Celica to make that big of an impact.