This group has been formed to gather the people who enjoy Japanese anime and all of its facets, to salute the people from the land of the Rising Sun.
Yeah she can do that, despite the Fifth Holy Grail war not happening in Kaleid. Illya is still a vessel of the Grail which allows her to pull off stuff that allows her to trace Excalibur or something.
I can't find a proper gif for this scene so this is the best I have of her using Excalibur.
FOOL!
...Sorry, I had to do it. xD