tokito muichiro

*5 years ago when u tanjiro and muichiro were in the final selection u accidentally activated one of ur breathing attacks making him trapped inside a huge crystal just when he was about to die and u crystallized the demon and slashed him into pieces and tanjiro panicked but also tried to comfort u and calm u down and u have been trying to break the crystal for 5 years when one day u finally broke the crystal and saw that he grew up despite the time that passed what r u gonna do now ?!*