User blog comment:ClayHuang158/Sidnara/@comment-3391671-20161209110239/@comment-3391671-20161231032119

All is sure that Sidnara is looking more complete. Good job ^.^)b

As for lore, I would follow what you had initially: a Piltovian mechanic who worked with Demacia to make a suit. I would like to play around with what you had, so here's my mini-lore for her:

Short version= Sidnara is a genius scientist of Piltover, overshadowed by other great invetors. She is not recognized mostly due to overrash experimentations and her haughty attitude. But one day, a Demacian investor comes to fund Sidnara, which she happpily agrees to. Upon creating a prototype, Sidnara attempts to bring it to Demacia to show its progress. But on the way, she is ambushed by a Noxian troop. Before he immenent death, the investor reveals that he's actually a Noxian assailant who had eavesdropped on the project and planned to high-jack it for Noxus; The original investor had been assailed before the prototypes were completed. But little did the assailant and the troop know that Sidnara would take up one of the prototypes and slay them all. Upon returning home, Sidnara also noticed her lab had been ransacked of the prototype's documents. With only the one prototype equipped to her left, Sidnara urges herself to create a better battlesuit based off this prototype, not for Demacia, or for Piltover, or for any country, but to show that her inventions are deadly and beyond capable. Long Version=
 * Piltover. The City of Progress. But even if you're a genius, some will go up while others are pushed down. Sidnara was one of those who had been overshadowed by other elite inventors. Why? Compared to other acclaimed inventors, Sidnara was a little less civilized, or as some would call less "scientist"-like. While all great minds should be adventurous and experimental, Sidnara was a little more rash than the normal crop, causing much too much worry for investors. While your normal inventor would be self-absorbed in their own thoughts, Sidnara would have the worse habit of getting up her high horses when someone offered even a speck of interest, with her haughty attitude driving the listener away. But it does not change that she is not ill-intended. Just a bit less mannered, as some would say.
 * One day, a Demacian investor named Tyler Forthwater comes by the city to find someone to help him with his "project": to build a human-augmentation. Unlike the Hextech augments, Tyler wants something that can be massed produced, along with being temporal armament instead of being a permanent attachment. Aside from the small wealth of his family though, this investor had no connections to Piltovians, and the Demacian government sent him on this quest without offering aide. However, by chance, Tyler met Sidnara on the streets, eventually offering up his idea. Although Sidnara, knowing her past experienced, warned Tyler of her usual issues, he was still interested in letting her be the inventor to the project. Sidnara's heart was touched to hear someone finally asking honestly for her help, thus she agreed.
 * Months pass and Sidnara is almost done with the prototype to her hextech suit. With the investment from Tyler being humble, Sidnara decided to avoid using too much hextech technology to fuel the weaponry of the suit, instead relying on primitive arms. Deciding on a weapon that is unique, Sidnara chose the chakram as the hextech suits ideal weapon, having seen them in books about Shurima. The rest of the suit was purposed to not only empower the user, but also grant flexibility and endurance; protection offered is minimal, due to how having too much protection would require extensive and expensive maintenance later on.
 * With a prototype ready, the investor brought to Piltover the few gentlemen of the Demacian court who worked with the investor to start this project. Seeing Sidnara's battlesuit, the gentlemen were much pleased, urging her to have it brought before the Demacian court and be realized to be funded better. Drawn in by this dream of fame, Sidnara rejected none, readying a cart with all the prototypes.
 * But on their way, the small party is attacked by a small cohort of Noxian soldiers. As to why they are attacking, none of the Demacians, and especially Sidnara, knows why. Nonetheless, the party tries to fight back. While successful in killing a few soldiers, the Demacian gentlemen one by one die, and Sidnara finds herself injured. She then realizes what she has in the cart: her prototypes. But as she looks in, all of them seem to be destroyed to her despair. As she meagerly tries to get them to work, she hears the voice of the "Demacian" investor talk to her in a voice she's never heard.
 * "Oh, poor Sidnara. Thinking she could finally become a famed scientists. But in the end... she'll die."
 * Sidnara looks back to see the investor, but with a twisted expression she has never seen on him before. Behind him are the Noxian soldiers, with an unfazed expression, showing loyalty to this man Sidnara had known as "Tyler Forthwater, the Demacian Investor."
 * "What... what's the meaning of this, Tyler Forthwater?" Sidnara inquires in this desperate situation.
 * "Meaning? Ooh, it's very simple, my dear," Tyler says in a quizical manner. "Noxian soldiers have raided your bandwagon and you will die."
 * "But for what!?" Sidnara demands a clear answer. "If they are attacking us, why are you on that side!?"
 * "Aah, that's so simple. It's because... I am not Tyler Forthwater," Tyler says with a grin.
 * As Sidnara can only let her mouth gape in a gasp, the man who she had known as "Tyler" reaches for the right side of his face with his left arm. And in a single slow yet clean movement, rips off what is a mask. Blood trickles at the edge of this man's face, but it does not change that together with his pale skin and narrow eyes, his sharp grin still point about his cheeks.
 * "While I do not usually name myself to my victims, but for you, you've been an entertaining... prey to be with," the man courteously bows. "The name is Ghelf Dolhephheim. And I am here to assail you and take your 'prototypes' with me back to Noxus."
 * Silence befalls on the two, with Sidnara using what wit she has left to absorb the situation. And after a few moments of thought, one question still stands.
 * "What... where is... Tyler?" Sidnara begrudgingly asks where her true business partner is.
 * In response though, she feels the cold hand of Ghelf hold her by her chin. And as his face comes close to her own, Sidnara finds herself staring into his red irises.

To be continued...

Don't worry about grammer errors, but the above is my take of Sidnara and her backstory. The longer is still incomplete, but I feel I've written something decent if not better. Hopefully you like it.