Uichir

Uichir is the most amazing hashira also known as Muichiro the most pillar he is a fan favorite and is the youngest at the age of 14 his parents died of illness I think and his brother was killed his brothers name was yuichiro he was good friends with Tanjiro and beat upper 5 all by himself he is pretty much emo and died in the fight against Kokoshibo also known as upper 1 though he was a huge help to the demon slayer core.