His name will be Koumori Tsubasa. He is 19 during the story. He was an older brother to 3 siblings and had loving parents who owned a tree chopping company until one night a demon roamed into the house and killed his parents and siblings when he was 10 years old. He was only saved by the Sakuji Urokodaki but got an injury to his eyes making him patiently blind to make up for his sight he learned how to use echolocation to help him travel at couldn't support his family company so he gave the company to a family going by the Tokito's since they were working for his family for 5 is a very calm person who is compassionate to people who lost their family to demons and has a poor sense of humor .He now wore a black cloak with gray lines on it making it look like bat wings and the basic demon slayer uniform that was a lighter shade of black under had his black and gray hair into a small ponytail.
And like the title suggests his breathing style is called Bat breathing and I will explain it.
The breathing style is a branch of wind breathing and relies on quick airborne attacks that are built around the practitioner's flexibility, speed and also need 2 sharp Nichirin fans for it to has 6 forms in total.It's a difficult breath style to master, due to having to balance all of the complicated moves and such. The practitioner uses their strength to springboard off of surfaces, allowing them to do their airborne attacks with specific forms. They must adapt to the acrobatic moves the forms require them to do in battle such as flips and such.
First form: Sweeping bats "The user must use the strength in their legs to jump, shooting themselves up in the air. They must kick their legs forward and rotate themselves in a somersault like movement midair. They slice their fans forwards while in this motion."
Second form: Aerial fang "The user will run forwards with their fans being held in front of them. Springboarding off of the ground and into the air the breath user will perform an aerial midair with their fans pointing downwards. Letting themselves fall downwards and make a cut to a pinpointed area on the enemy's body. When they land back onto the ground they'll skid forward and strike their fans into their opponent."
Third form: Fourth form:"Vampire bat's shriek The user will slide themselves forward and pivot their body at a slight angle in front of their target. With folded fans they repeated stabs forward to pin points while knocking their opponent backwards. With a swift movement upwards they'll bring their fans up then perform a quick cut to the neck."
Fifth form:Fluttering Haze "This can be used as a defensive form when intending to protect an ally in battle. They'll jump upwards and in front of their target and use the opposite and blunt end of their sword to push their opponent backwards. They'll then flip their sword to where the blade is facing their enemy. Then after doing that the practitioner will jump and propel themselves up again and swiftly make a blow blow to the neck or head area, whether that be with the opposite end of their sword or their leg leaving them in a haze."
Sixth form: The flight of the bats "This form is mainly made to be used in areas such as forests or anywhere around large objects one can propel off of. If it's needed to use this breath form then it will need to be modified. The user jumps up propelling themselves up into the air above their target. They kick their feet forward and over their head so that they can successfully do an acrobatic flip in the air. If they are fighting around any objects such as trees or buildings they will springboard off of said object and towards their target. With a trust forward of their blade the practitioner will swing their blade at the neck of their enemy making a clean cut."
Hashira charts
Strength
1. Gyomei Himejima
2. Uzui Tengen
3. Kyojiro Rengoku
4. Sanemi Shinazugawa
5. Giyu Tomioka
6. Tsubasa Koumori
7. Mitsuri Kanroji
8. Tokito Muichiro
9. Obanai Iguro
10. Shinobu Kocho
Running Speed
1. Uzui Tengen
2. Sanemi Shinazugawa
3. Tsubasa Koumori
4. Gyomei Himejima
5. Shinobu Kocho
6. Kyojiro Rengoku
7. Giyu Tomioka
8. Obanai Iguro
9. Tokito Muichiro
10. Mitsuri Kanroji
Combat speed
1. Shinobu Kocho
2. Obanai Iguro
3. Tsubasa Koumori
4. Sanemi Shinazugawa
5. Gyomei Himejima
6. Giyu Tomioka
7. Tokito Muichiro
8. Kyojiro Rengoku
9. Uzui Tengen
10. Mitsuri Kanroji
Intelligence
1. Shinobu Kocho
2. Gyomei Himejima
3. Giyu Tomioka
4. Obanai Iguro
5. Tsubasa Koumori
6. Kyojiro Rengoku
7. Uzui Tengen
8. Tokito Muichiro
9. Sanemi Shinazugawa
10. Mitsuri Kanroji