Lydia for me started off as being taken from the end of Season 1/start of Season 2 (hence the nickname). Someone who was a supernatural creature, neck deep in the supernatural world, and didn't yet know about it - which is where the username comes from. And this remains a great place for the start of a PSL.
There are two other places I take her from:
- Season 3, knowing a bit about the world and having a power that utterly sucks (finding dead bodies), and trying to hold herself together
- Post-series, college age, with a significant amount of scars (which she normally conceals with makeup) and PTSD. She's left Beacon Hills for MIT or Oxford and is finding the work a challenge - but fitting in and the lack of adrenaline from near death experiences harder. Like a lot of mathematicians and social manipulators alike she's a keen and very dangerous poker player (who frequently pretends not to know the rules). For any smut threads with non-castmates this is the default.
In terms of AUs I'll AU her slightly into other settings.
Default Cyberpunk/Cinematic Spy/MCU AU for the BansheeFor Cyberpunk and cinematic Spy AUs where overtly supernatural effects aren't appropriate Beacon Hills is the location of a black experiment dedicated to the creation of post-humans (who Lydia nay refer to as the Dread Doctors whatever their real name). The werewolves are instead experiments mixing steroids, adrenaline, and healing abilities, with Beacon Hills hospital being run by the agency. Lydia on the other hand was experimented on by implanting a computer in her head which provided constant stimulation to her brain and is part of why she was so keen on math. When she was put in hospital by Peter (end of season 1) it was to have it upgraded. Oh, and to put some nasty little mind control programming in there. Plus some connectivity and it was some of the mind control code that lead to her sleepwalking. The Dread Doctors again tried to upgrade her via trepanning but in a way that would have melted her mind. And she's after the rest of the organisation
Physically she's no pushover but isn't amazing (although she recovers like an action movie star). The chip in her head means that rather than sensing death she can sense devices with electronic connectivity (which includes anyone with a radio or mobile phone). She can also mentally hack anything that doesn't have the proper patches applied; she's no super-hacker but this (now she can control it) can be useful for gathering information. She can also 'scream' at anyone wearing an earpiece; she doesn't need to break security to send a really nasty feedback loop down an audio device like an earbud or wireless headphone.
Default MCU/DC AU/616 AU
Half way between Cyberpunk settings and her core canon, Lydia's abilities come from a reasearch base run by Hydra or equivalent in her home town that was trying for something like the Super Soldier Serum and
mostly got werewolves. Her powers are more or less unchanged from her slightly ill defined canon ones (but may scale up or down depending who a PSL is; she's probably going to be more powerful in a PS thread with Thor than with Hawkeye)
DC(A)U/Arrow AULydia is Dinah Lance's cousin - or Laurel and Sara's cousin in the Arrowverse. She's got a sonic scream like her cousin, and some passive psychic abilities. And, depending where in canon, probably some martial arts skills (solid but not a match for her cousin) and has no wish at all to be a cape - but keeps getting dragged in.
Fantasy and Urban Fantasy AUsThe idea that the etymology of Banshee is "Bane-Sidhe" is nonsense, but it applies in these AUs. In settings where the Fair Folk are a major thing Lydia's great-great-something-or-other grandmother either slept with or made a deal with one of the fey, and it bred mostly true through her maternal line and her father wasn't entirely human either. Lydia is thus half one of the Fair Folk (almost certainly Unseelie/Dark Fey if it matters) but raised as a human.
Hogwarts AULydia's parents raised her at least in part in the non-magical world, with her mother being either part banshee or part Veela and keeping it secret.
In the full Hogwarts version she was one year older than the Golden Trio and was sorted into Slytherin, and did her canon "I'm going to pretend to be stupid" thing although seldom in potions and was a favourite of Snape's who thought she had the potential to be a new Potions mistress. And of Trelawney who thought (rightly) she had the sight and (wrongly) that she had a lot of respect for Trelawney herself. At some point, as a prefect and member of the Inquisitorial Squad she took a long look at herself and what her house was doing and went undercover, getting really good at not catching people or giving out creative punishments that meant she didn't hand them over to Umbridge (on one occasion she made the Twins clean the Slytherin common room boys' bathroom by hand - with explicit instructions that she didn't want to find any pranks in there for the next four days; five days later the toilets ate three Slytherins,holding them captive for a few hours) . She only openly showed her side at the Battle of Hogwarts, unleashing area of effect spells into the rear of the Death Eaters before running away.
Star Wars AULydia goes through a lot in canon, and there are a number of points that fit the Star Wars canon but may not have all been through. Whatever the situation she's force sensitive with little formal training (except in one of the points below) she's teetering on the edge of which side of the Force she is on; her Banshee Scream translates as a
Force Scream and as such is a dark side power while her Precognition, Force Sense, and
Psychometry are generally in her canon much more light side. All of which brings her close to the edge,
There are multiple canon points she can be taken from that map to very different places in the SW universe; these are suggestions all during the period of The Empire.
- Force sensitive who just "woke up" and has no idea what is happening, probably having woken up screaming at the destruction of Alderaan. Wants to refuse the call to action and let the Empire pass over her.
- Little more awoken and being manipulated by a Sith/dark side wielder and/or sleeping with one. Needs at least some rescuing.
- Rebel by slightly reluctant choice, trying to learn what her powers mean; no idea she's a Force wielder
- Experimental test subject, possibly an Inquisitor
- Self taught near-Jedi-sentinel (with no lightsaber or knowledge of lightsaber combat unless someone teaches her)
Buffy CrossoverThe Nemeton is not a Hellmouth. Nemetons were trees planted by druids to seal potential hellmouths and drain their energy before they could develop. And while the Nemeton stood that worked - but some idiot cut the tree itself down a long time ago. There is some legacy protection from the roots of the Nemeton that mean both that it would be hard to fully open, and that it attracts the supernatural living rather than the actively dead (the wooden taste of the energy isn't to vampires' tastes) but in most ways it's an active Hellmouth, slightly smaller than the Sunnydale one.
oWoD
Lydia is, when push comes to shove, a Mage awakened by Peter Hale. But her focuses are round her being a Banshee - and it often lets her get away with pretending to reality that her being a banshee is an explanation so she can use it for coincidental magic. Her interactions with the Traditions have been negative so far (the Dread Doctors are Sons of Ether) but she's prepared to accept some of them might not be bad, and has a little borrowed knowledge.