Demon slayer fans

PLZ CAN SOMEONE HELP ME!? I've been thinking about this character for so long and I cannot remember for the life of me him ever being in the show after the test (final selection Arc) and IDK if I'm just blind or if he died but do you guys remember after the test there's like four or five people alive and throughout the first season we see Tanjiro, (ofc) Zenitsu, and the butterfly girl Kanao BUT WHERE IS THE FORTH PERSON WHO LIVED?! I swear I am losing my mind over his character because I don't know if he died or he's going to reappear further into the manga and I don't want Major spoilers but I want to know if he's ever going to reappear in the anime again? His name is Genya btw and I'll show a few pics of what he looks like under my post but he gives me major demon vibes and after watching the movie today I was wondering if he would become a demon just because of his personality and stuff that I got to see anyway