I'm going to assume there was some head emty moments when writing the commentary, and that "朝霜" for Asashimo was meant to be Makigumo. I don't see an Asashimo in any images from this set.
Jintsuu's cosplayer appears to have deleted their account at some point. The other two are tagged in the post as well as mentioned, but sumire_maru is only mentioned. There is a live 2021 account with that handle, but can't be sure it's the cosplayer.
Edit: They left a reply on the tweet for post #9939. Their original account is still live just renamed.
Note, for this set, the live @ points to a 2023 account that does not appear to be the original cosplayer. The plaintext @ is a former handle of 99tkmo, as they are still tagged in the post and left a reply.
The mentioned twitter account matches an artist with a danbooru entry, but I don't know if it's actually the same person since all their tweets have been deleted.
No idea who the cosplayers are on a lot of these. Only a few have @s mentioned, fewer of those are still live accounts. im making entries for everything that mentions a live account (this one does have replies from an account, its just private and i didnt notice its there, and i can't be sure it's one of the cosplayers in the image from the context)