This is how I read it (my interpretations bolded):
- Lyborick: And what about 'him'..?
- Meier: He said that he will come when the reading party begins, which is in about 20 minutes
(this person will come in 20 minutes) // 'The higher being' from there will not move for the time being
(this higher being won't move at all for now).
TN:"Reading party" it's something like, a person in question/'him' will first deal with their own personal interests, then they'll come and deal with the rest of the formal stuff.
- Lyborick: Then that means...
- Meier: Yes. // 'He' will arrive here soon
(it implies that this person will definitely arrive there soon, but the higher being won't move at all for the time being so it doesn't make much sense to be him; ergo it's most likely the person that will definitely come in 20 minutes or someone else entirely).
The 8th Son is already at the Nest guarding the Frozen Waterfall, so it shouldn't be him. The Higher Existence (most likely the Family Leader) won't move at all for the time being, so he can't be there soon (at least not yet). It's probably another person we don't know about (and judging by Lybo's reaction, he seems a bit agitated, it would seem to me this person is pretty important within the Family and Lyborick probably didn't fully expect him to come). If I had to take a guess it's either:
- Another Division Commander or the Vice-Corps Commander of the new 4th Army Corp.
- Someone that won't be part of the new 4th Army Corps, but extremely important within the Lo Po Bia Family (maybe a very powerful Branch Leader or someone from the main family?). Important enough to make Lyborick feel a bit agitated when he heard he's going to show up soon (in 20 minutes?), maybe he didn't expect him to agree to come?
Maybe I'm just overthinking it. That's another possibility ofc haha. I think the second possibility is a bit more likely than the first, assuming it's one of the two.