Why is the last panel not translated?!
What does the last panel say?
You mean the retroRPG thing? Pretty sure that's a credits card. The other Extras had something similar.
So the Hyakunin Isshu being her favourite book as a child is meant to hint that she is nearly as old as the book itself (meaning around 800 years old)?
~800 Years Old would also line up pretty well with the height of The Silk Road, her answer to the question of where she is willing to go alone, under the Mongol Empire.
Older...
We already kinda have confirmation she's over a thousand years old before this point, don't we..? Kinda weird to be speculating on age with an event 800 years ago when we already know she's acted like she has first-hand knowledge of stuff from the 700s, I think it was..?
I think it's more the fact that there really weren't much of actual 'children's books' for her when she was actually growing up normally, and that might have been the first proper written work she could think of with the question. She seemed pretty unsure of what to really say as a response to the question.
This is just more evidence to say she was active during all those 1300 years, that's all. Helps to dispel the theories that she has any supernatural ties to any 'moon rock', because the moon rock isn't an ancient artifact of hers, it's a very recent souvenir acquired at great effort from the NASA Apollo program. It can't have been preserved the way we saw it in that earlier chapter in the 'Estate' unless it was a relatively recent acquisition. Any theories that the rock is important in any sort of 'supernatural' way to Tsukasa are overblowing what was meant by 'important'.