Hi, asked to comment, I figured I could take a crack at this. This comment is particularly for Ultima, since we’ve done this tango on another series before.
To start off, the Nine Realms are accepted space-times. We know this to be true, as from Ymir’s mural,
the “sky” was born from his head. Don’t interpret the word “sky” as literal, as it clearly refers to more than just that, such as
the stars being considered real when looking at outer space, and more importantly when Odin killed Ymir,
he formed the other realms from his body. Each Realm operates on a separate time axis, as cited by Mimir, that
time flows differently. Once more, in Ragnarok, Kratos confronts Atreus in Migard, and claims Atreus was gone for “
two days” when in
Jotunheim, despite hours minimum passing in there. I’m aware that you might say “time flowing differently doesn’t imply a different time axis”, but this isn’t the case, as the realms need an item called a Bifrost,
which allows traversal, meaning that conventional walking isn’t enough. This is again proven when Odin
seals the realms apart, and you have to use
Yggdrasil seeds instead.
With this established, the 9 Realms are universal-sized bodies operating on their own time axes. I’m sure you know that space-times are infinitely bigger than their 3-D counterparts.
Onto the Yggdrasil, the more important bits, visually, the realms are sitting atop the
branches and roots of the Yggdrasil. In lore, this is reiterated, when Freya asserts all realms exist in the same physical space, but that its
roots reach out to all the realms, and the actual tree cuts between the planes. The latter portion is important, because where the bulk of the Tree is in the Realm between Realms. The literal
space between all Realms, and center of the
spiritual cosmos. Referring to a comment you made prior:
In this case, attempting to match your logic here, the 4-D space (Nine Realms), are displaced across the 5-D plane (Realm between Realms), and therefore the Yggdrasil,
which stretches out infinitely. I hope this recontextulizes the arguments in a new light, had to do a lot of reading for this, lol.
