(Is this the same anon?) :|
Past Nanna didn’t write the note in the jokebook. Nannasprite did, pretending to be Past Nanna. Nanna may not have known anything about her death or the session, beyond what she learned from the Batterwitch about it growing up.
Grandpa Harley likely entered the session through the portals underneath the frog temple elevator, messed around in there a while (possibly QUITE a while, long before the players entered), went back to Earth and back in time — likely through a Skaia meteor portal during the reckoning — to fill his house with trophies from the trip, continued to raise young Jade there, and then finally got shot to death. He was never revived at any point; it was just one continuous lifespan.
I don’t blame you too much for being confused by Grandpa’s timeline in particular. Even with clarifying quotes like "An old man has much to do before he returns to Earth, dies, gets stuffed by his adopted-yet-biological daughter-slash-grand-daughter, and stuck in front of a fireplace.", there’s a lot that’s just implied by distant facts throughout the comic.
Technically speaking — unlikely as it is or seems — it’s possible that Grandpa Harley hasn’t even “gone back” yet, somehow hiding himself and his ship (which can be captchalogued) on the golden ship (or using the unknown route the Condesce used to hop between sessions/universes) to do something decisive before he has to return to B1 Earth:
EB: [your grandpa] seems like he was an awesome guy, i would have liked to have the chance to talk to him.
GG: maybe you will get that chance john
GG: yes, as a matter of fact i am sure we will both get that chance!
GG: i once dreamt that we would
When Jade said this, it was before she entered… in other words, while she was still under the impression that her penpal was her “grandson”. She might have mixed up a cloud vision of her and John meeting Jake for a vision of them meeting an inexplicably young Grandpa, but even though it’s possible, this quote makes it seem unlikely. In fact, it almost seems to be stating definitively that John and Jade will run straight into Grandpa Harley… which they haven’t done yet.
I have serious doubts about Grandpa showing up in the alpha session; in fact, until I reviewed the evidence and that quote, I didn’t find it likely at all. It seems ridiculous, too. However, it’s still a possibility you need to look out for, just in case. For example, Grandpa has a stuffed Typheus Minion, and Typheus was never awoken in the alpha timeline as far as we know, is yet to be awakened in the alpha session. He still might have managed to bag one with the denizen asleep, but it’s at least a potential hint in favor of him sticking around longer than we thought.
In fact, you could probably imagine Grandpa Harley and Grandma English showing up at the exact same time — Jade English using the same crazy sort of temporal route Grandpa used — piloting ships which could unload their ordinance for a sudden strike against the Battleship Condescension.
I mean, if there’s one thing this comic doesn’t have enough of yet, it’s ship-to-ship battles.