Jason's memories were taken sa pamamagitan ng his patron goddess, Hera. Do you think Percy's will be taken sa pamamagitan ng Hera or another Olympian?

Hmm...
In my mind, yes, I do think Hera took Percy's memories (even though she's the last god besides maybe Ares that he would trust).

I mean, we don't know (do we?) if Percy and Jason willingly gave up their memories (which I doubt). Hera/Juno could've just appeared suddenly one night and took their memories and sent them to walang tiyak na layunin places where they'll get picked up sa pamamagitan ng campers from both camps.

According to the gods, this plan was Hera's/Juno's plan and her's alone... unless my brain is mistaken, of course.

@partypony, it seems about right.

Throughout the Nawawala Hero, they constantly noted that Hera took a huge risk, or something like that, so I'm assuming she's the only God behind this, thus meaning she definitely took away Percy's memory, if Percy had his memory taken. Nothing is known for sure about Percy, only speculations.

I agree with both of the nakaraan answers, but some naggy little voice in the back of my mind keeps going, "Hestia would be the only god(ess) he would trust! Listen to me Catherine!"

It was definitely Hera since Hera was the only god to not go silent and none of the other gods have a reason to take Percy's memory away and put him at the Roman camp that we know of. It was already kind of implied at the end of The Nawawala Hero that it was Hera.
Then again, I could be completely wrong; it could have been another god/goddess that did that and it was supposed to be a big surprise in a later book, making this my biggest fail yet...but that's unlikely :P XD