Turns out there were a couple of female characters I had forgotten about, albeit both of them being side-characters. (Herald's sister, and a character who is either born through magic or born well after the series ends; I honestly don't remember which of the two it was. I know it's the former if during the series because one of the parents is too young and both of the parents involved are too responsible to allow for a teen pregnancy, but these are two characters who I can see past-me having canonically paired up by the time of the epilogue and have them have had a daughter by then.)
Mostly, I was right in my knowledge of my own characters, including correctly remembering Gary's surname as being Cross. (The reason there was doubt about that is that the character I made for a roleplay had the surname Cross, and I was wondering if I was just thinking of their surname when trying to remember Gary's, but nope, I had it right. Apparently I think Cross is a good surname for a guy.)
There were a lot of plots referenced which I had forgotten about, too, though a fair number of them I remembered.
My notes are a chaotic mess, over a hundred pages that includes background rubyverse knowledge, random snippets from scripts, outlines loose plot event locations...kinda difficult to follow, but that's to be expected.
This has only increased the amount I want to do art, dangit.