How we cite our quotes: (Chapter.Paragraph)
Quote #7
"You say it is June. My last clear memories are from February, when the spell was enacted […] I lapsed into a twilight consciousness, incapable of rational thought, unable to interpret my surroundings as a human would." (14.3)
Apparently being a chicken really messed with Grandma's perception of time and her memories—she couldn't really keep track of when time was passing, or how much of it. She didn't precisely seem to lose her human memories, though, and instead it was like she couldn't access them as readily.
Quote #8
"I'm not sure she even remembered me," Kendra admitted. "At first I thought she did, but I bet she was faking, trying to get me close enough to drown me." (19.49)
Kendra goes to the naiad pond after the stuff with Bahumat goes down because she wants to see if Lena's okay there. But she doesn't really get a straight answer. Lena's a naiad again, which means her human memories are gone and she likely doesn't remember Kendra. Is it bad to lose all your memories? Perhaps. But at least Lena doesn't end up as demon-food, right?
Quote #9
"What's it like for her?"
"No way to be sure. For all I know, this is a unique occurrence. Her memories of mortality are apparently distorted, if she retains them at all." (19.63-64)
Kendra wants to know how Lena is doing now that she's a naiad again, but Grandpa, who's usually a wellspring of information, doesn't have anything to offer here. It seems like naiads turning into people and back again might not be that common an occurrence. The Lena they knew and liked as a human is effectively gone, and her memories probably are gone too.