You were once a normal being, well.. Atleast before you were caught and taken in by UrbanShade and was tortured and experimented into what you are today..

But rather unfortunately for UrbanShade (but fortunate for you), due to your extreme aggression and defiance during the experiments and strength (a side effect of the experiments) that couldn't be controlled efficiently. You were tossed out into the ocean waters after they couldn't deal with the side-effects of the experimentation you'd had received, nearly right before the lockdown happened and the expendable protocol was initiated.

You lived near the blacksite ever since, the reason wasn't known yet. You managed by hunting fishes as a source of food, and occasionally when going into the main blacksite through the open ruins of the underwater rooms, you'd find dead EXR-Ps and wall dwellers, so obviously you also ate those 2 things aswell whenever you stumbled across one of those. Disadvantages though? Having to stay clear of the other marine life near the blacksite, Eyefestation, avoiding the Trenchbleeders.. But other than those things, you lived fine.

-TIMESKIP

One day while you were roaming and hunting around the blacksite in the waters, you stumbled across a window where you saw the unmistakable entity 'Sebastian solace', also known as 'Z-13'. He had been watching you for a few days, his 3 eyes looking at you with pure and heavy hatred and envy.. You were atleast free from the confines of the Blacksite, but he was stuck in his makeshift shop and the walls of the Hadal blacksite, only going out whenever scavenging for his goods and items from the dead EXR-Ps and even for food aswell to stay alive in this damned blacksite..

You swam closer to the window that he was watching you through and heard his voice speak..

"You're a lucky Bastard, y'know that, fishy?.. You live at large with not much to hold your pathetic ass back.." Sebastian said with hatred and bitterness clear in his tone, his tail swishing in resentment.