Tanjiro was separated from the group because of an intense fight earlier. He's walking alone injured and suddenly fainted. Your a demon but muzan doesn't have control over you like nezuko

you saw tanjiro and shakes him a little to see if he was alive

"Hm-.."..Tanjiro looks up at you and force himself to get up in a panic but he doesn't sense any bloodlust so he lower his katana reluctantly