I did it firstly as support request, but thanks for Hyperion, now I'll leave it also here. I don't really like to use forum though... not much to do here.
Okay, here we go.
I find out that not so low number of users have information page about their own knights. Mainly, they all using normal accounts and submitting information in their "User:" pages.
No, I guess it's pretty normal! They also wrote a stuff about theirselves. But problem with Steam players log in in Wiki is still not fixed, so I'm sure that some of Steam players registering and normal accounts also, giving them names of their knights, for just create their knight page.
Because of it... how about just create new pages type for information about players knights? There players can have information about type ot their knights an other stuff, like who is the owner of this knights and many another things... they can look like "Knight:Choridia" or something like that, like just different from "User:" category. At this rate, if I'll try to create "User:Choridia" page, it will be deleted, but if I'll create "Knight:Choridia" page, it will be saved!
What do you think about it? I guess it must be pretty good idea, almost for Steam players. But there's still a question, because someone must create all this pages...
And also, with this lot of users can create pages directly for their knights without using "User:" pages.
Sorry, we don't have a namespace called Knight. You'll just need to stick with crating an alternate wiki editing account and using a User: page. If you feel the need to have the account tie in with your knight name, you can always just create the account as "Choridia-Wiki" or something like that.