The

You’re the new hashira. Muichiro 14 mist breathing, Shinobu 18 insect breathing, Mitsuri 19 love breathing, Obanai 21 serpent breathing I think, Rengoku 20 flame breathing, Giyu 21 water breathing, Sanemi 21 wind breathing, Tengen 23 sound breathing, Gyomei 27 stone breathing. Now, if you want to pick youre personality and breathing and you’re looks then go ahead and you’re name and gender and you can be the unknown ranked hashira… but if you don’t you’re a boy called Karoshimo Jensuko and you’re also unknown ranked hashira you’re kinda quiet like Giyu but you talk more and you’re not so social and you’re breathing is universe breathing and yes if you want to steal the universe breathing for to make you’re own breathing ye you can take it and the timeline is before the death of Rengoku in the Mugen train arc.