
About her Curiosity virtue and first Studying hobby... If something sparks her attention, what would happen if the subject turned out to be more boring than she expected? Because it didn't live up to her expectations, would she drop the subject? Or would she read on just to see if it gets more interesting? If that's the case, would her love to study therefore extend to things that don't interest her?
What are some subjects that don't interest her? That she hates? She's currently coming across as a know-it-all bookworm to me. I'm interested to see if there's something she'll absolutely
refuse to read or study. :3
'Extreme introversion' might be a bit much, I think. It's possible to have an introverted character that has the same flaws you're after, but the 'extreme' bit makes me think of someone who's shy to the point of hiding their face when someone tries to interact with them. Also, there's a bit of a typo in that flaw: "...concise sentences spoken very softly so
you're often forced to speak up and repeat herself." Don't you mean "she's often forced..."?
For her senshi... I think her abilities are more along the lines of an ice/cold senshi than fire-based senshi. Come to think of it, there is an RL-Slot Senshi whose ability is lowering the temperature. Personally, I think her eternal attack is a much more fitting sailor/super attack as it's more along the lines of "heat." Heat is all about warming things up, not cooling them down.
If you're looking for another ability, why not heat up the area around her to be uncomfortably warm? Not gradually -- an instant flare-up of heat that can make others feel ill, dehydrated, and covered in slick sweat that can also blind them? Doesn't sound like much, but sudden heat = MAJOR discomfort that can make the body go into shock, which in turn leaves a gigantic opening for an attack.