I would say yes, but it is your choice. Would this be like actual Terraria characters, forum members (not based on their character in the game, but instead their avatar or something), or both?
Terraria Community Forums
AstroBot
JohnLePink
well, mostly forum members. I might throw in an NPC or something every once in a while, but I want to focus on members
AstroBot
Interesting. Good luck!