Yep! A glowing, flying goldfish. In my memories, I saw them swimming in the sky around the Tokyo Skytree. A flying penguin was trying to eat them, and one of the fish flew into her body.

[Rinka taps on her stomach, approximately where she recalls her past self seeing the fish go in.]

And then here, Retrospec sent me a card that just said 'fish' and the same fish popped out of the mailbox.