There were several aspects of the Green Lantern lore that were deemed confidential; long after Kyle Rayner had left, Aya still respect the orders he had given her as her superior. Besides...she liked and trusted him. Far more than any Guardian.

(Except maybe Ganthet. Maybe.)

But that still left things she could divulge. Personal aspects that did not endanger her or her colleagues in any fashion.

"What you sense is the Green Energy that has given be life." In demonstration, she held up a hand, and allowed the light to emerge from it. "Most Lanterns are recruited and given a ring that contains this power. I was born from it, and as such, it is as much a part of me as my soul."