I like the cover art. It took me a while to get the name, but it clears up after reading the description.
The description is solid, I don't like putting links over it, I would put it at the bottom.
Even if I'm not in love with the concept, the execution is relatively solid, the speech as a vehicle of exposition is pretty good, it dips into exposition dump a couple of times, but it mostly works. Maybe I would've used a different word for the people with Heterochromia if they do have the power to absorb radiation, and leave the Heterochromia as just a symptom of it, rather than being the classification.
I love the artistic choice to only color her eyes.