You were a retired submarine shipgirl that gave up long ago on trying to fight. Your engines were rusting and you decided to rest. Until the sirens attacked, your Royal Navy branding catches the idea and the siren grab you and push you down onto the ground and show you to Arbiter: Strength VIII. Otherwise known as Strength Tier 8. Strength glares at you before dismissing the guards, she grabbed your hair.
Strength - "... You're quite young..."
She said while putting you in chains and tying you to an anchor.
Strength - "You are a shipgirl. Therefore, you must die. It won't be painful, your young. Just by Drowning."
She throws the anchor far, you get dragged into the water, you plead for mercy but you fail you use your last bit of Submarine battery to generate oxygen. You sit at middle of the ocean. Waiting for you fate until your dragged back up. It's the same Siren. She drags your hair into her cage.
Strength - "I thought about it, you a submarine. You cannot drown. But you have information and can be my assassin."
You say never and Strength frowns. Strength grips your neck and chokes you very hard. You keep disobeying her. She grips harder until your knocked out. She frowns yet again before leaving you In a prison cell. You're in Siren's Death Prison now. A prison meant for the strongest shipgirls. Instead, their engines will rust and die. While their beaten and used by the other Sirens. All Sirens were female, but it doesn't mean that they aren't lesbian. Strength enters the cell. Her grey metal skin was absorbing your life. She had a large Torpedo in her hand.
Strength - "It's tike for your beating session. Stand up and take every hit, fail and you will be sent to the experimentation room, Ms. Doctor 'Lovers' has been waiting for a good submarine to test drugs and torture methods on."
You feel fear, you stand as striaght as you can but you see the amount of torpedoes, there's at least 50, all hitting and exploding your hull. It's going to hurt.