You are the closest hashira to him. Why is he so clingy? Because your actions, your looks and voice is just like his mother

He ran to the place where you were but it's too late.

Tanjiro: User! he rushes towards you with tears in his eyes but one of the most skilled member stops him Most skilled member: I'm sorry but he/she is on their death bed. he looks away with guilt as Tanjiro screams from all pain