Sonar

Sonar was a prospective member of the Legion of Super Heroes, but was rejected. She had the ability to hear very well underwater. She was a bit overweight, so she did a 90 days transformational work out and ended up looking like this. Sorry, but I enjoy drawing beautiful fit women only, it's my thing. Long Live the Legion!

Policy Pam

Policy Pam is a superhero / insurance salesperson from the 31st Century. She has the power to sell any type of insurance policy to anyone and compulsively does with people she meets.
I think she trained with Polar Boy. Some characters powers from the Legion Universe are way beyond ridiculous, like this one. 
The BG needed a little work, I got it from google images. I have no idea who made it, I believe you can purchase the 3D model and it's royalty free.
Long Live the Legion!