So after finishing the kny manga a few months ago, I decided to spend six hours researching the light novels and side manga to try and put together when the hashira became hashira so imma share it with yall. HOWEVER the side stuff and light novels donât line up exactly to canon events and descriptions which could entirely be because the side stuff was written by someone different, even if it is official, but it could also be because the kny mangaka didnât really think out the timeline idk though. This is what I have gathered so far since then. Discretion: My findings are not going to be 100% exact yâknow? if yall have critiques thatâs fine, thereâs a lot of holes in this
Has been a hashira for 2 years
Became a hashira at 16 years old
Three year age difference between her and Kanae as she became head of the butterfly mansion at 14 when kanae died at 17
Kanae died at 17 years old, would be 21 in current events if she lived
âCompletedâ final selection at 13
Been a hashira for at least 4 years since hashira before Sanemi
He was at latest 17 when he became a hashira
Was a hashira before Kanae became one and when kanae and Shinobu both finished their training with the cultivators as seen in the hashira meeting with Gyomei
This suggests that he was a hashira for a few years before Sanemi making him a hashira around the age of 15
This falls in line of the logic that a fast time to becoming a hashira is two years
Probably became a hashira around the age of 15
Has been a hashira around 6-7 years
Wasnât a demon slayer at least two years ago at age 17Â
Became a demon slayer at age 17 ½ as she passed final selection in six months
Most likely became a hashira a year prior
Most likely age of becoming a hashira is 18 years old
Lines in the second light novel chapter 3 suggest that she was a hashira after Obanai and Muichirou
12 years old when saved by the previous flame hashira (Rengokuâs father)
Was not present when Rengoku became a hashira at 18 ½ years old making Obanai 19 ½ years old and still not a hashira
Lines in the second light novel chapter 3 suggest that he was a hashira before Mitsuri
Probably around 20 when he became a hashira if we coordinate times with Rengoku and Mitsuri
Unknown if he became a hashira before or after Muichirou but most likely after (see Muichirouâs bullet points)Â
Tengen, Gyomei, and Giyuu were already hashira
A hashira for at least 4 years since Kanae died four years prior and they interacted as fellow Hashira
Wasnât a hashira or demon slayer at 15 years old
Ubuyashikiââs disease wasnât as far progressed as it was during Sanemiâs first hashira meeting, meaning it was at least a few years before Sanemi was a hashira when Ubuyashiki asked him to join the slayers
Claims that he isnât talented and had to work very hard to get as good as he is, this suggests that it took at least a year or two to become a hashira (it is said that it usually takes 5 years to become a hashira or 2 if youâre quick enough)
Has training as a shinobi so it would make sense for the two years to be what Tengen used to become a hashiraÂ
At least five-six years as a demon slayer/hashira
Was at least 17-18 when he became a hashira
Been a hashira for around 5-6 years (maybe 6-7 years if I feel nice)Â
Been a hashira for at least 4 years as he was a hashira before Sanemi
Was the hashira that saved Shinobu and Kanae when they were little and a demon killed their parents
Became a hashira after two months of training
Was barely an adult when tragedy struck the temple he was staying at with the children
Probably 18-20 when this happened
Ubuyashiki immediately broke him out of jail and offered for him to join the demon slaying corps
This would put him becoming a hashira at around 18-20 years old
Has been a hashira around 7-9 years
Muichirou (14 years old):
Became a hashira after two months of being a swordsman
Was not a hashira at the time of Rengokuâs appointment to hashira about a 1 ½ years agoÂ
Both parents died when he was 10 years old
That spring Amane came to visit them to try and recruit them to the demon slayers
That summer a demon came and killed his twin brother, he was 11 years old
Wasnât a hashira when Rengoku became a hashira meaning he was 12 ½ and still not a demon slayer
Probably joined sometime after Rengoku when he was 12 ½-13Â
Lines in light novel 2 chapter 3 suggest that he was a hashira before Mitsuri but no evidence found if he was one before Obanai however he is a prodigy and became a hashira fast meaning its most likely he was a hashira before Obanai
Giyuu, Tengen, Gyomei, Shinobu, Sanemi were all hashira already
Wasnât a hashira when Mitsuri first trained as a demon slayer which was two years prior
Mitsuri became a demon slayer at age 17 ½ so Rengoku was 18 ½Â
Rengoku very soon around the time of Mitsuri passing final selection replaced his father as the flame hashira after defeating lower moon 2
Has been a hashira for 1 ½ years
Age of becoming a hashira: 18 ½ years old
Gyomei (27 years old)- became a hashira around 7-9 years ago
Giyuu (21 years old)- became a hashira 6-7 years ago
Tengen (23 years old)- became a hashira 5-6 years ago
Sanemi (21 years old)- became a hashira at least 4 years ago
Shinobu (18 years old)- became a hashira 2 years ago
Rengoku (20 years old)- became a hashira 1 ½ years ago
Muichirou (14 years old)- became a hashira around 1 ½ years ago
Obanai (21 years old)- became a hashira around 1-1 ½ years ago
Mitsuri (19 years old)- became a hashira around 1 year ago
AGAIN this is just what I put together at 4am from appearances and line from the manga, light novels and side manga, it is not necessarily the correct timeline but the kny timeline in the canon manga is weird so I digress.Â
