Responses
tokito, the mist pillar, was one of the two babies in the stroller, and giyuu, the water pillar, was one of the three kids who passed by tanjiro while he was running! he was reincarnated along with sabito and makomo. yushirou was also still alive and painting pictures of tamayo-san who he still loved.

The love pillar married the snake pillar
(≧∀≦)
The rock pillar work in kindergarten (is he still blind) (︶︿︶)
Wind pillar and his brother are together I'm really happy 4 them the most
From what I see in the new generation that tanjiro sis married the thunder breath boy
(ノ≧∇≦)ノ
And the beast breather married the girl that who worked in the butterfly thing ⁄(⁄ ⁄·⁄ω⁄·⁄ ⁄)⁄
But they didn't say anything about mist pillar ┗( T﹏T )┛ neither the water pillar or flower pillar (/TДT)/
I said a lot sorry but I just can't believe it's the end