monii

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 don’t 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 didn’t 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 y’know? if yall have critiques that’s fine, there’s a lot of holes in this

Shinobu (18 years old): 

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

Giyuu (21 years old): 

“Completed” 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

Mitsuri (19 years old): 

Wasn’t a demon slayer at least two years ago at age 17 

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

Obanai (21 years old): 

12 years old when saved by the previous flame hashira (Rengoku’s 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 Muichirou’s bullet points) 

Sanemi (21 years old):

Tengen, Gyomei, and Giyuu were already hashira

Kanae was still alive

A hashira for at least 4 years since Kanae died four years prior and they interacted as fellow Hashira

Tengen (23 years old):

Wasn’t a hashira or demon slayer at 15 years old

Ubuyashiki’’s disease wasn’t as far progressed as it was during Sanemi’s 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 isn’t 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 you’re quick enough)

Has training as a shinobi so it would make sense for the two years to be what Tengen used to become a hashira 

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) 

Gyomei (27 years old):

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 Rengoku’s appointment to hashira about a 1 ½ years ago 

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

Wasn’t 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 ½-13 

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

Rengoku (20 years old):

Giyuu, Tengen, Gyomei, Shinobu, Sanemi were all hashira already

Wasn’t 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 ½ 

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

ASSUMED TIMELINE 1: 

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

Demon Slayer: Hashira Training Arc

“my name!!! is gyoubu masataka oniwa!!!”