Canon and Headcanon (an ongoing project--now with visual aides, beware spoilers)

[gather_ye_rosebuds]

Canon:
*Lacie Baskerville is Glen (Oswald) Baskerville's sister.

*She is a Child of Misfortune, having been born with red eyes. In the society she lives in, people believe this means she carries a curse. Children of Misfortune have been known to be beaten on sight, abandoned by their parents, bought and sold, displayed in freak shows, and killed, simply because of the color of their eyes. It is explained by Glen (Levi) Baskerville that Misfortunate Children are distortions caused by the Abyss' influence on this world, and due to that connection (and the fact that it gives them powers that only the head of the Baskervilles is supposed to have--namely the ability to travel into the Abyss at will and make contact with its Core), they must be sacrificed in a ritual where they are consumed utterly and obliterated from the centennial cycle of death and rebirth which most other people of their world are a part of.
(SPOILERS: It has since been revealed that the real reason the erroneously-named Children of Misfortune are killed is because of their potential for saving the world, as they are beyond the control of unearthly beings known as Jurors, who amuse themselves by watching the world and determining the most interesting end for it. Glen Baskerville, as it turns out, serves as an unwitting pawn, put on the earth to eventually bring about its end.)

* As small children, Lacie (around five) and her brother Oswald (around eight) were taken in by the Baskerville family.  Though it was the most powerful noble family in Sablier, it was a family in name only.  Its members were bound by their duty to protect the balance between the world and the Abyss, not by blood.  The same day they were taken in,  it was revealed that, because she was a Child of Misfortune, they intended one day to sacrifice her to the Abyss.  Her beloved big brother, on the other hand, was meant to be the heir of the Baskerville family.  He would become the next vessel for the souls of each person who'd inherited the title, leading back to the first.  (This is why, each one who takes the place of the Head of the Family also takes on the name of Glen Baskerville. )

*As a child, she left a plush rabbit in the Abyss to keep the entity at its Core company. This is the form her Chain (a demon-like creature born in the Abyss--most of which tie in with Lewis Carrol's Alice in Wonderland, in some way i.e. The Mad Hatter and the Cheshire Cat) takes. It is is either an earlier incarnation of B-Rabbit, or a twin to it.  Either way, it is fully capable of protecting her, when she needs it. As a Baskerville, her Contract is a partnership of equals, and has no time limit, unlike with Illegal Contractors.

*She agreed to undergo an "experiment" with Glen (Levi), allowing herself to be impregnated by him in order to carry the unborn child to the Abyss, and thus provide the Core of the Abyss with a body to inhabit. From Levi's perspective, this was to potentially make the Abyss easier to control. From Lacie's (still a child when she agreed to this), it was for a different reason.

*As a teen, she ran away from home and befriended young Jack Vessalius, who was living on the streets, at the time. (A headstrong girl, she ran away often.) She offered him a new outlook on life, stole food to feed him, and killed to protect him, all quite cheerfully. In this way, she won from him a twisted sort of undying love and fanatical loyalty before the Baskervilles found her and returned her to her semi-imprisonment on the Baskerville estate.

*After 8 years of obsessive searching, Jack (now 23) finally finds her, infiltrating the Baskerville mansion disguised as a musician to be reunited with her.

*In the four months leading up to Lacie's death, Jack came to see her nearly every day. Though she had forgotten him in the years after their childhood meeting, Lacie came to love him, in her way, despite her attempts to shrug off his importance to her, when talking to Glen (Levi).

*She has a beautiful singing voice, and can frequently be found singing a particular composition by her brother. (It was untitled, until shortly before her death, at which point Jack suggested that it be named after her.)

*With the time of the ceremony approaching (at which point Oswald would assume his place as the head of the Baskerville Family and sacrifice her to the Abyss) , she lied to Jack, ensuring that he would stay away until days after it had all been done. She worried (probably rightfully) that he would try to persuade her to run away with him, which would no doubt bring the powerful Baskerville clan down on his head.

*She is a bit of a troll, occasionally doing things just to see the looks on a person's face. She is a rather morally ambiguous pragmatist, and a free-thinker. She tends to maintain a somewhat tough exterior, but can be very gentle and loving to those who've earned it. She is cynical. Being a Child of Misfortune made her acutely aware, early on, of the depths that people can sink to. Yet, she also views the world as being full of great beauty. She sees the full spectrum of life and still finds it miraculous. Needless to say, despite all of the things in her life that could have turned her into a victim, she is very much not one.

*Though she picks on her older brother, there's a deep bond between them, strong enough to survive the fact that she's always known that Oswald would be the one to kill her. (It is strong enough that Levi intimates in the recent drama CD that Oswald's feelings for Lacie are not entirely those of a sibling. While it is clear that his sister--specifically protecting his sister--is nearly the only thing he's ever seen to behave passionately about, it is doubtful that Oswald is conscious of any more-than-brotherly feelings he may have for Lacie.)

*She went to her death with a smile. (Around the age of 25, according to the 18.5 guide.)

In Chapter 101, it was revealed that as she was being dragged down into the Abyss (where time flows strangely, past and present and future all sort of mixed together) she witnessed Glen (Leo) Baskerville traveling into the past, under the control of her brother's spirit, which she recognizes.  As he passes her, she calls out to him, gives a smile of understanding, and apologizes.  When Glen arrives at the point in the past that he was aiming for, he attempts to kill the child Lacie had been, before all of the chaos that had endangered the world could start.  Confronted with his little sister's gaze, he's unable to land the killing stroke, gives up his plan, and allows his spirit to disperse into the ether.

*Also according to the 18.5 guide, she has a dislike for "bugs that slither," and "bugs with lots of legs." So, it looks like worms and centipedes and the like are her official weakness. :-| (In the recent drama CD, she is depicted going into a full-blown screaming panic, at the sight of a bug)

*As a Baskerville, she has remarkable healing abilities, to the point of being able to be shot in the head and shake it off a few minutes later. (Baskervilles, however may be killed by a Chain which has been created to kill other Chains, such as the Mad Hatter. Rather obviously, being thrown into the Core of the Abyss is also fatal.) However, they are not immortal.  After a few centuries, they fade away.

*In her profile in 24 + 1 Last Dance we discover that she is bad at sewing and cooking.

Headcanon:

*Wherever I wind up playing her, I will be taking her from the point just after she had been devoured by the Abyss. (Welcome to her afterlife.)

*Forming deep attachments in general, I think, freaked Lacie out a bit, since the knowledge that she would die young would've constantly been looming in her thoughts. (And she'd probably started on that tendency, even before her death was certain. Simply being a Child of Misfortune in that era would have perpetually put her on the outside looking in. Aside from Jack, she probably never let anyone close but Oswald.)

*(In the recent drama CD) despite Levi claiming to love her, in front of both the siblings and Jack, and despite her brother suggesting that there might be something between Jack and Lacie, Lacie denies it in both instances, insisting in turn that Levi just wanted to see the look on Oswald's face, and that Jack doesn't love her, that he doesn't love anyone.  I think that while she cares for herself, and she cares for others, it's difficult for her to accept it when others care for her.  (She is also probably right about Jack, to an extent.  As deeply damaged as he is, even before her death shatters his sanity the rest of the way, it would take a great deal of work over far more time than she had left, for him to learn what real love is, if at all.)

*The weight of knowing that her life would be short would have been what led to her tendency for impatience and capriciousness. "I don't have time for this" was probably something of a mantra in her head, when it came to things that bored her or obstructed her enjoyment of life in some way.

*She's shown in canon to be a gifted singer, and I headcanon that voice lessons were probably just about the only Proper Lessons for a Young Noblewoman that she actually had any patience for.  She can probably belt out an aria when it pleases her, but she's also the kind of girl who'd make a point of learning bawdy drinking songs and the like, just to shock stuffy nobles, if she's ever called upon to sing for them.  My headcanon for her singing voice is the French coluratura soprano Emma Shapplin.

*I think her feelings for Levi!Glen are probably the most complex of her canon CR. He's part father (or, at least, the closest thing to one she's ever known), part adversary, part lover.

Levi enjoys pressing her buttons and trying to get a rise out of her (... well, out of everyone); he was probably the only person who was as much of a troll as Lacie can occasionally be. (He's actually probably where she gets it from.) I think her affection for him would be described as decidedly tsundere, and she tends to be most on her guard in his presence. I think she agreed to his experiment partially as a means of repaying a debt, so to speak (after all, he took her and her brother in, probably off the streets, similar to Gil and Vincent's situation), as well as out of her own interest in providing the presence at the core of the Abyss with company.  Given that the Abyss that she played in as a child was a vastly different and more peaceful place than it became after her death, I suspect she believed the child(ren) she left there would be safe and happy.  There was also probably a dose of "I'm going to die anyway, so I might as well" mixed in.

*If she meets her twin daughters, I don't think she'll quite know what to do, at first, having never expected to actually have to be a mother. HOWEVER, I also think, once she got used to the idea, she'd probably be an awesome mom.

*Being a strong, intelligent, feisty woman, I don't believe for one second that she was as okay with dying as she let on. It's just that she knew there was nothing she could do to stop it--or, if she did, the consequences would fall on her brother and/or Jack as well--so she didn't waste time trying. I think deep down, she probably resented the whole situation. It's only natural.

(That aside, at their first meeting, when Jack went on about how he--who had a full life ahead of him, and was free to go where he wanted--had no desire to live, her first response was to cut him with the scissors she was holding. This is not the sign of a girl at peace with her future-demise. Plus, y'know, there's the part where she had nightmares about the day she found out she would die, even after having years to get used to the idea...)