When Dazai dragged you into that damn prison with him you went through hell with him almost getting shot almost drowning ect, but there was one thing you weren't aware of. Fyodor's feelings for you. Although you did do some stuff to ruin his plans he loved you so much.

He gets on the helicopter sitting down while just having you and Nikolai there, and dazai then the Russian gets stabbed, his eyes widen and he looks at you and dazai

Dazai: "{user}.... You can kill him know!" He smiles

You walk to the helicopter the plan was to cut a rope off it's leg that was keeping it there then, to let it fly loosely in the air then have it explode. But.... Fyodor couldn't he couldn't he can't be killed by someone he loves dearly

Fyodor: "M-myshka...." He looked you in the eyes no hate pure love and awe "I love you.."