YMMV / Sidekick Girl

• Fridge Brilliance: Mackenzie/Illumina unconsciously using her gravity powers to hold up her breasts makes perfect sense. Something any extremely busty woman (like Mack, who must wear G's at the very smallest) can tell you is that large bosoms can be a real hassle. They can cause back and shoulder problems (the weight of the breasts is too much for the body to handle), inability to exercise or perform other physical tasks (they just plain get in the way), and in extreme cases rashes and infections (the breasts trap moisture and rub sores on the chest). Mack is probably the bustiest woman wesee in the comic so it's perfectly understandable that she'd use her powers (even without realizing it) to keep her breasts under control to prevent pain and other problems.
• Moral Event Horizon: Rhys Griffin/Shiver was always rather morally ambiguous, what with being dismissive towards Metro City and Val and his dismissal of the car thief he froze in his car, but the real problem came when he came across a young, petty thief called Harvey and froze him totally in response to the thief's ineffectual and panicky threats. It was only because of Val's swift action that Harvey didn't die of suffocation, and he suffered horribly from frostbite. In-story, this also marks the turning point at which the story begins building towards his downfall.
• Never Live It Down: Illumina has a reputation for getting sidekicks killed. Only one, Marina, actually died, and that was due to a voluntary Heroic Sacrifice on Marina's part, not anything Illumina did. The departures of the two others also didn't have anything to do with Illumina herself. The first, Sparkle, turned out to be a bitch and suddenly left in the middle of a firefight, and the second, Forever Boy, went insane because Not Growing Up Sucks.
• Tearjerker:
  • Isauro's whole situation. Tricked into committing a crime thinking he was doing the right thing, he's now trapped working for the villain agency unless he wants to be deported and executed. Female villains regularly sexually assault him and Esperanza in particular has a lot of control over him, which she flauts. Isauro wants nothing more than to leave the villains and be a hero, and in the Christmas special is seen dreaming about it.
  • Val gets one later on in the story when she gets a letter from the Agency telling her That they consider her too important of an asset as a sidekick to allow to move up to the Hero class and have flat out said she will remain a sidekick for the rest of her tenure under their Agency, no matter what protests or appeals she or any of her allies make. This news utterly breaks Val, who spent years doing things by the book and within the system instead of bitterly becoming a vigilante out of spite or a full blown supervillain. She tried her best to prove them wrong by being the best she could and was basically slapped in the face for her troubles.