I appreciate the notice Arcana.
As far as I can see, XX has a similar case with her Quick card attack animation. She summons a laser sphere to omnidirectionaly hit the enemy. I presume that either the power comes from integrated space tech on her cap (as an independent extension of her mecha suit) or directly from her (powerful) ahoge. Lorewise, I’m thinking that it’s likely high energy ions or possibly ‘lore’ mana from Rhongomyniad or herself.
Considering X’s record I’d place the bets on the second XX ahoge hypothesis.
The power of the inner Altrium!
(Serious) Note: I’ve also read that she can also materialize the suit extraordinarily fast at will, so it might be that she materializes only the minuscule offensive armament on the third ascension and gets the job done as easy as if she was wearing the whole thing to begin with.
Edit: Hope that helps.