Hi, I'm a big fan of this so far and it looks really cool!

My idea is for sort of a mostly cephalopod themed superheroine in terms of powers (super strong and flexible tentacles and body, limited shapeshifting/camouflage, able to swim at high speeds through water jet propulsion, limited regeneration, can shoot high pressure ink or water from hands or mouth etc) but taking some cues from Aquaman or Namor as well.

In terms of secret identity stuff I was thinking of tying her to the Filipino diaspora somehow since 1920's California is kind of a big time for that and something I can speak to a little culturally, but not sure could just go with the underwater civilization angle.