A mod deactivated your character for a reason, you probably know of that. When you clicked back on to double check the character after it was deactivated, you must have deleted it. Simple as that.

If you want the character to still be active here, you're gonna have to re-make the character. As you said the character has disappeared completely.

Or...if you go to the characters section and look in "My characters" Fearsmoon might be there, click on him, and it will say something like "This character is not active" and there will be options to re-submit, modify or delete the character.
If Fearsmoon isn't in that section, he's definitely been deleted (therefore, you cannot re-submit or anything like that because he doesn't exist here now and Balto Source) and you will have to re-make him.

WildWind99rose: It had been deactivated for a reason for example using other members usernames and only using half of them a history was too short. Do you understaind now

but it din't happen to my other deactivated characters?

yep. what mighty said

Simple, a mod deactivated it.