Surprisingly, I've never gotten into Heroes. I watched the pilot episode and missed the next few and never tried to catch up - Regardless, I'll try to sum these characters up as best I can. Monica, played by Dana Davis (top 3 photos), is from New Orleans, works at a fast food restaurant, is the cousin of a character named Micah, and has adoptive muscle memory - which basically means that after she sees something once, in person or otherwise, her mind records it and she acquires that skill, either temporarily or permanently. This power applies to martial arts, hand-to-hand combat, playing the piano, cooking, etc.
Here's a clip of Monica beating the BREAKS off of a would-be robber:
Maya, played by Dania Ramirez, is from the Dominican Republic and has (or had?) the ability to emit poison and cry black tears (if you can't tell, I'm kind of lost in these character descriptions because they're pretty complex, so I don't know if the black tears ARE the poison or...). She tries to make her way with her twin to America to meet a doctor who can help her with her abilities and ends up killing some people on the way - but she's not evil.
Monica & Maya (Heroes)
Callisto
Callisto is also played by actress Dania Ramirez, so she's tied with Halle for how many superheroines she's portrayed; the two appeared in X-Men: The Last Stand together. I should also mention that I have a personal affinity for all things X-Men related. I was OBSESSED with the cartoon as a kid of the 90s and I still watch it on Toon Disney, even though they're BOGUS for only showing it at midnight and 1:30am - probably because they know all the people who love the show are adults now lol. But I've seriously digressed. On to Callisto: She has superhuman senses, heightened strength, speed and agility, accelerated healing abilities, and can sense mutants' powers and their magnitude - an ability she uses to locate other mutants. At some point, she got tentacled arms. She wasn't written as a Black character, but I'll take them where I can get them lol. In the cartoon, she was the leader of an underground group of deformed mutants called the Morlocks - she wanted to capture Cyclops to reproduce with her and rule by her side.
Here's a clip of Storm and Callisto fighting:
