Based on the following question, which happens to be about a roleplaying game taking place within the (non-roleplaying) videogame of Terraria.
Recapping the original question; the user has joined a special server for a video-game that has been set up to permit its players to roleplay within that video-game. The question is specifically about the interaction between the players of said roleplaying game. The entire fact that it is played within Terraria is, in fact, almost irrelevant to the question.
If this question was asked about a game played over Skype, IRC, or Tabletop Simulator, it would definitely be on topic. Even if it were played in a Neverwinter Nights module set up for roleplaying, it would almost certainly be considered on topic.
I do not feel that just because the roleplaying game takes place within the context of a more traditional video game, rather than a sandbox or a roleplaying game, it should automatically become off topic. I am very confident that people at Arqade cannot answer this question (and will almost certainly redirect the user back to here).
Fundamentally, the question is about the act of shared storytelling, which seems to be what we are here for. That the roleplay happens within a video-game is provided for context only.
As such, I feel the question should be reopened and questions about roleplay within the context of a video game, as long as the question is about the interaction between roleplayers and not about the video game itself, should be considered on topic.