What is the name of this demon slayer?

I love Demon Slayer for the animation, story, and fights! I'm only going over the Demon Slayer corp and you have to GUESS who is who in the GIFs I will soon show to you... The quiz should be very easy if you've watched most of Demon Slayer and those who haven't but only heard of it can somewhat easily guess this. I'm confident most if not all will be able to get over 80% at the end of this quiz! If you want me to do a whole quiz going over Demon Slayer as a whole then go ahead and get this to 250 plays! Anyway, good luck and have fun!