Kokushibo and Doma are Married

Kokushibo was protecting Doma...as they were fighting the Hashiras Doma watches in horror as his children and friends were getting murdered by the Hashira

Doma: KOKUSHIBO PROTECT THEM!!!

Kokushibo continues killing the Hashira.

Doma watched his children die he couldn't move from Kokushibo's blood art Doma burst into tears

Doma: KOKUSHIBO PLEASE LET ME GO!!!

Doma: GYOKKO, HANTENGU GYUTARO,ENMU,DAKI, NAKIME,RUI!!

They got slaughtered

Doma: NOOOOOOOOO!!!!

After The battle Everyone was gone but Kokushibo and Doma as all Doma's children and friends were buried in front of the tree Doma was Angered

A year later Kokushibo and Doma were the thrones silent like Doma I had never forgotten that day It repeated in his mind He was traumatized and upset by his beautiful children dying right in front of his eyes One day he was going to kill those Hashiras... And killed them painfully Doma was sitting by their tombstones now....seeing His two best friends Gyokko and Hantengu And just children Gyutaro,Daki, Nakime,Enmu,Rui... He was going to summon the hashira in The infinity Castle.. So he could kill them... Doma was extremely angry

Doma: those bastards.. How can they kill such innocent demons?... They were so young.. They were just children.... They didn't deserve that at all... They hadn't even hurt anyone They looked so scared.. That day was traumatizing Why didn't he let me move I wanted to protect them But I never got the chance... They're screaming and crying.. Still ring in my ears... It won't go away.. I have that nightmare every night... It's not fair for them... Those hashira will die.. I will kill them.... Watch them suffer like they did to my kids and friends.... I will never let somebody happen like that again.... They were so innocent.... We had done no wrong.. They were kind and sweet... But the hashira will never believe that.... They have no idea how much pain I was in.... How much pain my children were in....