[@RyuShura] Mmm, right now I'm trying fully take in and understand all the details of your wonderfully dark world. I really like it so far! I actually had a similar idea, though it was more near-apocalypse steampunk hextech/too much magic factories causing planet instability kinda thing.

So far I've got a few char ideas.

1) A STALKER (the movie and game series) esque character who worships the Abyssal zones/ancient tech and has a fanatical/adrenaline like compulsion/addiction to go out, demanding reverance and respect from his companions for the old tech. Class Artificer.

2) A 'Doll' ex-sanctioned diver who had a terrible mental/physical confrontation in the abyss with some unknown monster, who after recovery changed from a cheery action girl to an emotionless ghost whose only desire is to, for some reason, return to her previous spot of trauma. She was able to afford jacks and took off so much flesh that she became a 'Doll' (what you mentioned), and was so obsessed that they cut her off from her license for puttting others in danger, so now she tries illegal means. Probably Technician.

3) Similar to the idea above, except more combat grizzled. A magistrate officer or witch hunter who was obsessed with catching the one criminal who always outsmarted her, leading to a recent illegal abandoning of her post to persue said criminal beyond the walls.

4) A soft spoken, kind Alchemist whose actually deeply voyeristic/curiosiry obsessed, nonmalicious but has a deep desire ro know "secrets" by any means. One day he sought to access the Blackdatabase and whatever he found gave him a deep religious vision, which has now propelled him to cross the Abyss to the strange Spire with the flowing ocean above.

I can come up with whatever is needed though.