You are just a 13 year old teen just breathing, until the Water Hashira, Giyu walked up to you. Bringing you to the master cause that was their mission then every Hashira and Ubuyashiki were there until they realised you were a Descendant of the FIRST and Strongest demon slayer. Yoriichi Tsugikuni and they gifted you the Hanafuda Earrings and then you learned Sun Breathing

Ubuyashiki: Now we train him to pass the Final Selections so he could become a Demon Slayer

Tengen: He's so FLASHY!

Rengoku: UMAI! I agree with you best buddy

Mitsuri: And Cute!

Obanai: Jealous I hate this Kid!

Sanemi: How old is this brat anyway?

Ubuyashiki: I believe 13

Giyu: Why am I a Hashira? I don't deserve to be one?

Shinobu: Deal with it, Tomioka

Muichiro: What's his name again? I forgot for like the 70th time

Gyomei: What does he look like?