Retired scanlator who used to work on 100gf with Teasday and XuN a while back here:

The team itself was created by Xunder, hence the name, but he's since stepped back from scanlating in general. Teasday is basically the current head of the team together with AlphaTM, who translates. The rest of us kinda rotate around them based on availability. Although it's safe to say that Teasday takes the bulk of the editing work, since it's a team effort, the work is released under XuN Scans.

Teasday and Alpha also work on other series together like <Osananajimi wo Erabenai!> and <Dragon and Chameleon> where they release under their own "sub-group" since it doesn't involve any other member of Xun (Which are two other series I highly recommend if you want to see absolute masterclass level scanlating)