The knight wasn't one to believe in the omnipotence or immortality of anything, god or fairy, and so he took the girl's words with a grain of salt. No doubt she believed what she said, as fairies were unable to lie, but there was a difference between a lie and a lack of information. "Perhaps you can draw energy from nature," he said, "But what of the sword? To remove it from its spring of origin... at the very least we would need to bring some of the magical waters with us."
He made his way to her side, noting the way she looked down and slowly reaching out to stroke her hair. He wasn't sure how much of her was real, and how much was Glamour, but wanted to provide some measure of comfort. "Nothing is truly immortal... even gods can be killed. But when you live for so long.... you must get lonely," he remarked, walking her back to the spring. "Do you often long for companionship, Aqua?" He realized this was most likely not her true name, as knowing the true name of a fairy meant having power over her, yet he still used the nickname she had provided him, as it wasn't his goal to have such power over her.