Dearest Imoto; it seems you can not see the wealth of tales hidden within the story you have spun, and are in need of some aid. It brings me great sorrow that you appear to be unable to explore dearest Saphire's tale to the fullest, and I would like to amend that if given the chance. So I ask you to allow a humble teller of tales such as myself to reveal that which you already have created, so as as to light the flame of your creative soul. Let us commence at once.
First her family. You say that her goal make enough money so that her parents may retire, yet we know nothing about them aside from the fact they are on the run. So I ask, why? What were they like? Were they famous, or small time hunters? Why were they on the run and desperate for work? Did they assassinate someone important influential or powerful? Did they unravel some great conspiracy or attract the attention of some large organization? Or perhaps they discovered some ancient secret or technique for which they are sought in order to silence or obtain their knowledge?
Why were two experienced hunters running? Surely they must have been greatly skilled in combat given Sapphire's apparent mastery five different weapons; and the fact that they enlightened her as to the ways of nen implies that they spiritual skills weren't lacking. SO why didn't they fight back, and if they did, did it end badly? Or did they choose not to fight because of some greater reason, such as a promise or mission? Moreover, what happened to their allies? Surely someone must've helped them while on the run and taking care of a young girl. If so what did they think about them running, while dragging her along? Did her parents ever consider leaving her to be raised by a trusted friend in order to protect her?
This brings us to Sapphire's childhood, or perhaps the lack there of. What did she think of her families situation? Did her parents explain to her while she was young the reason why they were running, or did they keep it a secret to protect her? What was her early life like? How did she feel about moving from place to place all the time? Did she even have any friends? What did she do when her parents were away on missions? Was she left alone or did she stay with a family friend? Did she even know what her parents worked as early on? Did she receive a proper education from her parents, or did she learn things from the streets and her travels as time went on becoming clever and street smart instead? Was she ever kidnapped or placed in a dangerous situation because of her parents? When they time came to tell her everything how did she take it? Was she happy to finally know the answers or was she infuriated by having something so important kept from her? Did her parents enemies ever find out about her? What did they do about it?
Now concerning her skills. Had her parents always been formally teaching her how to fight for self defense, or did they just play odd games with her which turned out later in her life to have been training all along? Or did she actually ask to be trained once the cat was out of the bag? How were her first lessons? Was she a natural, or was she a pathetic ball of failure who through time and dedication became the great warrior she is today? Why five weapons? It's hard learning how to use one, and mastering to similar weapons isn't a cake walk either; SO why was she trained in five weapons that were so different? The katana and wakizashi is a standard amongst samurai, wakizashi and tanto was ideal amongst rouges duel-wielded; but why both a glaive and a chakram? Is this part of some secret family martial arts style? Also, did they start teaching her about nen then due to the dangers of those hunting them, or did they wait until after her license exam to teach them so?
Now as to her later years. When she came of age did she still travel with her parents? When did she separate from them? Does she still even now where they are right now, or do they sort of just coordinate visits with each other?Are they still being hunted or did they finally manage to loose their hunters? Are they still hiding from their enemies, and if so, is there a bounty out for them? Did she ever-fall in love or has her whole life been spent running and hiding? Has this left her sour or cold, or did she manage to adapt some how? Does she want to take out the people that are after her parents? Speaking of which, what did her parents think of her becoming a hunter? Where they glad, or did they try to make her choose another line of work? DO they feel responsible for the dangerous live she lives, and does she blame them for it?
What was her hunter exam like? Was she lucky enough to pass without incident, or did she just make it by the skin of her teeth? Has she made any allies since then, or any enemies? Anyone from her post which have popped up again, or is she walking her path alone refusing to let anyone near so they don't get hurt like so many other were because of her parents running? DO her parents enemies that she's a hunter know? DO they even care?
What are her current ideas for helping her parents? Is there a particular type of mission she likes to take? Has she made a name for herself yet as a hunter, or is she just fresh of her nen training?
These are, but a few of the many ways sweet Sapphire can grow. Each one further defining who she is, what she stands for and what she desires to become. All possibilities for you to choose from based upon your own whims; and I hope these questions and paths may aid you in weaving this grand tale.
In addition to this I have a small comment concerning your hatsus. While it is true that some hunters have multiple hatsus, most merely have a single hatsu than can be used or manifest in different ways; though it all falls under a central theme. As it is many of her powers seem disjointed; most lacking the basic imago necessary to understand their power. You say quickstep 10x her speed, but we don't know how fast she normally runs. We know she can fly, but not how; nor do we now how she calls items to her person or sends them away in mid-flight. For this I have a suggestion, which may add even greater versatility to your character.
As all of your powers deal with the apparent manipulation of kinectic energy I'd suggest crafting her hatsu as telekinesis. Given that her nen teachings were based around the teachings of zen and the enlightened mind; mind over matter fits well with your characters over all theme and may even allow you to those wield all five of your weapons at a time. Though that would only be the tip of the ice burg of course; also do not be afraid of rules and punishments, as they aren't really. They are merely another tool to help define howy our power works and can add additional flavor and power to it. If you want an idea of what I'm talking about, I ask that you take a peak at my CS's on page 7. Through the use of rules and punishments I managed to create to simple yet powerful ability for Sakuya based around the idea of an adrenaline rush; while I essentially turned Dimitri into the minecraft guy minus the need for a crafting table.
These are all merely my humble suggestions as a fellow storyteller and Co-GM of this tale. You are free to develop these ideas or leave them as you see fit, I only hope that this helps you further develop dearest Sapphire; as I wish to say what will become of her. Should you desire to further discuss this character or any other, as well as any idea you are working with feel free to drop me a line via pm; or if you want you may send me your messenger handle so that I may aid you in whatever way I can. I humbly place myself at your disposal and will await your decision dearest Imoto.