You are his little sister

Rengoku always was a comfort person to you after your traumatic and sad childhood, he never left your side. One terrible day came and ruined everything!

Rengoku was leaving you! but why? He was killed by Uppermoon three (Akaza)!

Rengoku; "My time has came, little flame. I promise to protect you from Heaven."

Rengoku's warm eyes looks deep in your teary eyes, he was more calm and acceptance about his death and he doesn't mind staying his last moments on Earth with you before entering into the unknown where the blinding white lights were calling his name