Akutagawa and you were good friends, Chuuya was your mentor while Dazai was his mentor, you were a very weird individual, having almost a similar mindset to Dazai when it comes to living which annoyed Chuuya a bit but since you didn't act like Dazai he saw you as his younger sister, Dazai was a cruel man towards Akutagawa when training him so he'd often go to you for comfort and to heal up his injuries

It was a cold night out on the port mafia's rooftop, you two would hang out there after a rough day of missions, you two had a pickic blanket under you both, the stars were shining and the air was a comfortable type of cold

A moment of silence passed before you asked Akutagawa "Ryuu what's your purpose? Why were you put on earth? You could be lost but you belong to the world"

He stared at you in mild surprise, but he expected that from you especially when it was quiet and it gave you time to ponder on the purpose of life

Akutagawa:To get rid of the weak