This is an essay post! On recent events in Jennifer's life.
So what just happened?
To summarize briefly: Following a string of fights post-card plot, a lot of arguing, and enough drama to fuel an entire season of 90210, Jennifer and Sam finally acted on their long-standing unresolved sexual tension, tried to have sex, were turned into animals courtesy of The Rule, and then ended up causing... more drama because of it, this time with the Supernatural cast. Jennifer got angry again, ended up sabotaging her relationship with Needy, and then tried to talk to Dean and ended up dead for the fourth time.
OKAY. So this is essentially an essay (or "essay" because I'm lazy) on Jennifer's motivations, behaviour, and feelings. I DON'T KNOW HOW LONG IT WILL BE, let's see.
Changing Motivations and the Winchesters :c
So Jennifer, upon coming to camp, met the Supernatural cast, or at least Dean, Sam, and Castiel. After learning what was going on there, she got scared. Not scared enough to act as a deterrent, but scared enough to actually feed into her covert (and sometimes obvious) antagonism. After flirting with Dean, she tried to kill Sam, was killed by him instead, and then got... well, really obsessed with the whole situation. Jennifer's constant propositioning and eventual make-out sessions with Dean were not just because she thought he was attractive, it was an attempt to, upon learning what the "family business" actually meant, exert a measure of control of the situation. Plainly, she was trying to get him on her side the entire time, in case shit went down and she needed an ally. Obviously, this really didn't work in the end, and in fact never did work at all. With Sam, her post-decapitation harrassment (sexual and otherwise) of him was because she wanted to kill him and get revenge really badly. So she decided to insert herself into his life. This backfired primarily because she eventually started genuinely enjoying his company and she eventually completely forgot about her own revenge plot and started getting invested.
Fear and Sex
Now, Jennifer has a camp history of trying to sexually assert herself to people who terrify her. This isn't some sort of masochistic thing, but it is almost a pathological need to conquer anything she sees as a threat to her own safety and status (and also to an extent, Needy's safety and status). Back home, once she got used to being, well, a demon cannibal, she was pretty much top dog. One of the first people she decided to make her victim was the biggest, toughest guy in school. I mean, as far as metaphorical dick-measuring competitions go, that's a pretty cool one. So she killed the biggest guy she knew easily, and got used to being the boogeyman.
In camp, she really is far down the power ladder, and it makes her incredibly scared and insecure about her own safety. People like Castiel and Ivy fall into this category of people Jennifer is scared enough of to crave sexually, and to some extent (before being shot by him), Dean is also in this category. But mainly, Jennifer was terrified of Sam and just really wanted to obliterate what she perceived to be his self-righteousness and drag him down to her level. As I've already stated, she pretty much forgot aboout her motivation to kill him, but she did retain the need to dominate. Of course, then she started feeling kind of guilty about that.
"I am not insecure, Needy. God, how could I ever be insecure? I was the Snowflake Queen!"
I think before I go any further, I should explain a bit about Jennifer's insecurity and view on being a monster! Jennifer is really obsessed with the way she looks, to an unhealthy extent. Near the end of the film, Needy brings up the fact that Jennifer needs "laxatives to stay skinny," causing Jennifer to, well, lose it. I mean, even before becoming a cannibal, that's pretty much indicative of some sort of body-image issue or disordered eating. I don't think that Jennifer's sexual assertiveness is completely in reaction to feeling insecure about her worth as a person without her looks, but the fact that it's the only way she knows how to interact with men with points to at least it being partially for that reason. Clearly, Jennifer does enjoy sex and getting herself off and using men as sexual objects, but her constant flirting and drive to make people as sexually uncomfortable and attracted to her as possible does have something a little something to do with insecurity. Her obsession with her own looks and how much she is worth based on those looks is actually the only problem she has with being a serial-killer cannibal demon.
Yeah, so, she has definitely said otherwise in camp, but Jennifer has no problems with killing or eating people. She actually thinks it's fun and it makes her feel good about herself and she really has no sympathy for the boys she murders. She lies about this and tries to justify it constantly, of course, but those conversations are just that: lies. But being a demon does bother her. It bothers her because it pretty much demolishes her sense of self-worth based on her appearance. When Jennifer is hungry, she gets cranky and mean, but most of all she gets ugly (well, "ugly for her"). In a movie primarily filtered through Needy's emotional lens, one of the only shots we see of Jennifer alone (and from Jennifer's POV) that doesn't involve acts that move the story forward (which is usually eating boys) is her crying in her room, desperately smearing makeup on her face in an attempt to be pretty for prom. HERE IS A GIF, 'cause I like those:
:'( oh, girl
So yes, the monster part of being a monster actually did not bother her until camp, when she saw that other monsters existed and that... well, her kind is pretty routinely hated. Even though she is fundamentally less destructive in camp because of moogles and everyone being able to be revived, it ends up bothering her more.
Aftermath
Right, so Jennifer's insecurities directly fed into the part she played in the events over the last week or so. After the attempted rule breaking, the insecurities went into overdrive. Being a snake, instead of being person, meant she was without her primary weapons and defense mechanisms: her powers, her manipulation tactics, and biggest of all, her looks. She felt utterly defenseless, scared, and humiliated that this was a situation she couldn't at least attempt to control. She enlisted Naoto's help, and felt kind of better about herself. So when she turned back and tried to talk to Sam and encountered a lot of antagonism, she got really upset. And not just upset for herself, but upset for... the entire situation. This was kind of a new thing! The more she learned, the more she recognized that something actually terrible was legitimately going down, and even though she thought the Winchesters were essentially being horrible and immature about it, it made her panic. She wanted to help and she wanted to do the right thing.
Unfortunately, since doing the right thing is a new and big deal to Jennifer, she... really didn't know how to go about doing the right thing. She decided to go back on her promise to Sam to leave all of them alone and went to talk to Dean and attempted to lie about the whole thing, which was an incredibly stupid move on her part but fueled by good intentions. When Dean didn't buy the whole thing, she got angry because she was trying to help and no one was appreciating it, so she basically told Dean to kill her, not thinking he would do it (even though she had been warned). Buuuut he did.
For the last few days, she's been off in the forest spending time with her animal friends and not talking to anyone. Currently, Jennifer is really in an emotionally bad place and feels incredibly victimized and desperately wants someone to feel bad for her, but she doesn't know who to talk to that would give her sympathy and coddling (which is what she really wants).
NEEDY THIS PART IS FOR YOU
ALL OF THIS is further impacted by what happened with Needy. During the time leading up to the attempted rule-breaking, Needy wasn't around. And Jennifer, being as dependant as she is on her, had no one to talk to. After it happened and Jennifer found Needy again, she tried to talk. Instead of getting the reassurance she wanted, Jennifer got what she interpreted as a lecture from Needy, which pissed her off. So she brought up the subject that she had been careful to avoid previously to now, which was Chip. Now that set Needy off and she left and Jennifer felt alone again.
Now, with the whole Chip thing, my own headcanon is that Jennifer never liked him, never thought he was good enough for Needy, and in fact, was basically the third wheel in the Jennifer and Needy Show. But they started dating and suddenly Jennifer felt like the third wheel, and as a result, Jennifer's always been incredibly jealous of Chip. Now, Jennifer ended up killing Chip because of that jealousy and the desire to make herself the only person in Needy's life that mattered. But Jennifer doesn't rationalize it quite like that. If prompted to give an answer, she would probably say that she did it because he was a bad person and bad to/for Needy, and would follow that up with proof that Chip believed the worst in Needy immediately when Jennifer lied that she was cheating on him, and that Chip was also very quick to cheat with Jennifer. BUT YES, Jennifer is fully aware of why she did what she did, but would never admit to it, and the fact that it all essentially boils down to jealousy bothers her, because it upsets her own personal narrative of being a strong, I-don't-give-a-fuck, confident woman.
A lot of the fact that Jennifer is so fundamentally bothered by the entire situation with Needy is not just the fact that she has a difficult time recognizing her own jealousy, but because of a large amount of guilt. The Chip thing actually doesn't make her feel guilty, but what does is the fact that she "turned" Needy. Needy's status as a monster, and as a result, her status as a crazy person is Jennifer's fault entirely. Jennifer hates facing this fact, but she does acknowledge it in the back of her mind, and it's gnawing away at her. Unless she has a heart-to-heart with Needy about this--which probably won't be happening any time soon, to be honest--this is going to continue to eat away and Jennifer and affect every other aspect of Jennifer's life. Hell, she doesn't even like talking about her relationship to other people because there is a part of Jennifer that recognizes how fucked up it all is, and she really doesn't want to hear opinions on that fucked-up-ness.
To Conclude
Someone needs to ask me questions so that this isn't a mess and I can address stuff I didn't here.