Support Hunters are NPC characters from your team that can show up when sending out an SOS flare to help you complete your current quest. Because theyre NPCs, they will follow your lead and do their best to aid you. They wont be as good as a skilled player, but they get the job done. However, if you just join a normal lobby in Monster Hunter Wilds then it will default to trying to recruit other humans first, only resorting to Support Hunters if it cant find any. If you want to force the game
