So, I could imagine that it was some kind of corrupted protodermis that mutated toa mata and while others got a full dip in it, Gali got lucky and only got her lower body and the left hand submerged, so she remained the least mutated of the them.
Ha, she’s a mermaid, but aren’t those tubes connecting to the head remind you of something?
The build is basically the Nokama mermaid that I uploaded earlier, with some slight addons.
The main issue being stability the Gali version has a little contraption added to the front made of bohrok tooths which is supposed to work like a stand.
The other mutated toa mata will arrive soon…