Yoriichi is actually the same younger twin out-of Kokushibo – Michikatsu in cases like this as this is the name that Yoriichi realized him because the. During their childhood, Michikatsu always looked at Yoriichi given that inferior to your. In the event that twins was created, Yoriichi try ostracized regarding their sibling by the grotesque draw the guy exercise, while Michikatsu are selected become the latest successor of the relatives. The guy pitied Yoriichi for what the guy considered childish decisions, sparked towards the because of the exactly how Yoriichi manage embrace on the mom. Despite this, Michikatsu went from his answer to talk to and you may interact along with his young brother, also risking beatings using their father which forbade affairs amongst the a couple. On one affair, Michikatsu snuck inside and you will provided Yoriichi a homemade flute. The guy told your to blow involved if in case he was into the dilemmas, stating that he’d been straight away to safeguard their young aunt. 
Michikatsu is interrupted by their brother’s laugh and unclear about his brother’s cherishing away from what the guy reported to be an excellent “little bit of junk”
Whenever Yoriichi is revealed to own good prodigious, sheer ability getting swordsmanship, the new brothers’ roles in the domestic were corrected. Michikatsu are not considered this new successor of one’s family members, using up his brother’s short, separated room while Yoriichi took his set while the family members’ heir. Which experiences fueled Michikatsu’s wish to learn the ways of sword and you will perform stoke this new brewing ideas regarding envy toward their brother.
When he said their goodbyes, Yoriichi presented the flute Michikatsu got supplied to him
Whenever their mom passed away quickly, Yoriichi told Michikatsu he is leaving house. He beamed, carrying it personal, informing Michikatsu that it was precious which he concept of it him. Once discovering the mom’s diary, Michikatsu learned that Yoriichi wasn’t clinging to his mommy however, was help this lady, having identified regarding how her disease weakened the girl. This bottom line infuriates Michikatsu, a-deep hatred and you will envy to your Yoriichi bringing options inside your, to the point where the guy wishes Yoriichi got never been created and emotionally pleads to have him in order to die. 
It disliked merely expanded as he are protected away from a demon because of the Yoriichi themselves, who had be more powerful. After leaving their family unit members, the guy registered the new Demon Slayer Corps to fight near to his sis and be stronger. Michikatsu himself tried to understand Yoriichi’s Sunshine Respiration but was not able so you’re able to, alternatively using a good derivation one to turned into labeled as Moon Breathing. Michikatsu then turns to your a devil as a result of Muzan immediately after lamenting their incapacity so you’re able to actually ever exceed Yoriichi inside strength. Sixty decades later on, the two would satisfy for the past day. Michikatsu try intimidated by the Yoriichi’s mourning out of their decision, but try however terrified on enjoying your prepared to attack. Whenever Yoriichi strike, Kokushibo is as well sluggish to react and was almost beheaded. Looking forward to the following strike, he understood Yoriichi had passed away away from later years and angrily clipped his system into sense of inferiority the guy attained through the his lives.
This is certainly greatly required by the rips destroyed from the your just after knowing that the fresh new flute he previously gifted his sibling got stayed with Yorichii anyway this time around. In turn, Michikatsu couldn’t part with new flute pursuing the latter’s passing, and you may kept they for the their individual for hundreds Hochschule-Dating-App of years afterwards up until his own dying. Sooner or later, within his finally minutes, he understands his sibling is actually past your in most suggests and questioned your to own as to the reasons he was even born.