Fontaine Nekton and Jess Gorman from the cartoon series The Deep.

For Fontaine, try something like:

xthd33pfntnnktnx, 1girl, solo, female focus, green eyes, brown hair, pink hair, multicolored hair, short hair, two-tone hair, blue wetsuit,

For Jess:

xthd33pj3ssg0rmnx, 1girl, solo, female focus, teal eyes, blonde hair, long hair, ponytail, purple wetsuit,

Also, I highly recommend Fantasm as Checkpoint to use with this. Much better than Pony itself.