We zoom in the indian ocean where blagoj was training in everything as he was training his sub detected several unknown enemies

Approaching as he went to the beach to look to see several sirens and production vessels including their leader arbirter and her subordinates approaching the beach

As blagoj looked at them he asked them this

Blagoj:Who are you 

Arbiter:Im Arbiter the leader of the sirens and these are my subordinates observer alpha purifier and tester beta

Purifier:Nice too meet you so you fought the grey ghost herself

Blagoj:i did and the next time we meet she will die

Tester Beta:i hope you sucsead  im tester beta 

Blagoj:Nice Too meet you three

Observer Alpha:Maybe you should tell him Empress 

Arbiter:right you were defeated the last time because your human weapons failed you ours will not as the three cases were opened to reveal three diffrented types of Siren Armors

As blagoj was checking the swords and giving them a swing 

Arbiter:Its prototype armor for the next generation siren armor revenge is something we sirens understood you will lead my finest sirens along with these new production vessels as your personal army  to kill these shipgirls of the azur lane they have been causing problems for us kill them and you will be rewarded

Blagoj:Killing them including the grey ghost is my reward

As he grabbed the experimental weapon

Arbiter:The crown jewel  Still experimental converts water into beams of energized plasma

As water was put into it blagoj fired into a nearby rock destroying it 

Arbiter:Well do we have a deal

Blagoj:We have A deal Arbiter

https://youtu.be/C-MYB2uVR0Y

We zoom in blagoj personal room where he is dismantaling the siren

armors and making his own armors painting them  black as he pressed the thrusters on his boots and they were fired

as he was making the helmet the three observers sirens

were observing as he got his laptop on checking the helmet untill it fired at the roof

observer alpha purifier and tester beta:your re going to need a bigger helmet

blagoj:your right im going to need a bigger helmets as

he begun making the next one

we zoom later as the three sirens were waiting they looked to see blagoj in his new armor

black manta:how do i look

observer alpha:you look good blagoj

black manta:call me black manta you may call me blagoj when off duty so whats my first mission

tester beta:you and purifier are going to meet the ironblood and convinced them to join with the sakura empire to form the crimson axis and start the war

black manta:as you wish come on purifier

purifier:ill meet you there as she entered the portal leaving as blagoj got in his sub

and heading towards ironblood and thinking in his thought

time to pay enteprise you will pay with your blood