NPC Characters are welcome here on the site but there are a couple of rules that must be followed in order for you to be able to use them.
1. NPC characters are to only be used to help fulfill a RP plot or scene. An NPC character is a Non-Playable Character.
2. They may be used for as long as they are needed but you must post with every post stating that they are NPC Characters.
If they are humans post NPC Human, if they are bears, post NPC Bear etc. Just make sure everyone knows that it's an NPC Character.
3. If you plan to use a NPC character you need to PM both Drago and Cetra to inform them of the RP plot. What it's going to consist of and why you need to use NPC characters.
Follow those simple rules and you are set.