The two twin 14 year old boys were walking around town. They were running errands

Muichiro : what was the name of that bird again? What was it called...

Yuichiro : that was a pigeon you idiot! Rolls his eyes

Yuichiro was the mean one of the two twins. He was very mean and blunt and a complete tsundere

Muichiro was emotionless and seems distant. He is very blunt and can be slightly rude but mostly forgetful and emotionless. He was also a demon slayer being the mist hashira