Well she's using [i]psionic[/i] energy to make herself invisible so I would assume it would shield her from Minervas as well. At least that's what I get from it unless someone else thinks differently. I researched Invisible Woman and tried to see how her powers worked. I modeled Janelle's powers after hers but way less powerful. Hers seem to work psionically as well and she is able to be mentally shielded. Although Susan gained her powers from cosmic energy so it may be a bit different. I honestly couldn't explain it.

You can actually detect her easily if you're smart. She's physically and mentally shielded but no it doesn't work on the rest of the senses (yet). So you can hear her if she isn't quiet. You can see her foot steps if she steps in water, snow, etc. You can throw a liquid on her if you see her. Really cold temperatures will distort her invisibility. It's all laid out in the Limits/Weaknesses hider.