Looking for multiple avatars

Hi, I was looking for a couple of specific avatars, but looking up the avatars/their group/their universe in the worlds tab doesn’t yield any useful results. Specifically, I was looking for:

Lambda-9 task force member, AKA SCP-3198. description here

Artanis, Upon reaching hierarch title. description here

Karax, After fashioning himselves mechanical arms. description here

If anyone is able to find these, it would be greatly appreciated. Thank you!