"Strange" and "normal" are distinctions she makes herself because she lived two years with her weightless body and disconnected emotions making her alien and that's the sort of thing that doesn't just leave a mark but recreates you. This is what living without weight means: your shoes are hard to lift all the time and your clothes drag like tangible gravity. You don't carry bags anymore and you learn to work with only what you can keep on hand. Your health evaluations are done in private and your records say 5 kilograms of girl. You measure every step like you'd fly off because you are weaker than the wind and all that weighs you down are your secrets and the things you carry to protect yourself. The world weighs heavy on you and you hold the world away, behind books and edges. You draw lines around yourself, an absolute territory that cannot be crossed, behind that line: normal, behind yours: strange. Everything that seems unusual is because you yourself are strange so it's you, all you and not them. Your mind has two years to align itself to this perspective.

Living two years like that, even restoring her weight and emotions fixes nothing. She remains estranged from her mother and carries over almost everything else. Her past and her secrets are hers to divulge in her own time and kindness, when not asked for, a form of hostility. Good intentions are just another excuse for optimism and self-deception and she's been there, bought that, lost a lot of money to con artists. Hitagi handles human interactions like combat, in terms she knows how to survive. She uses distance to protect herself first and full-on aggression second. She has her defenses down to an efficient science. As Araragi notes, she was able to create a Pavlovian reaction to staplers in a single experience.

Traits that already existed even before her encounter with the crab were exacerbated or revealed to be what they are: the budding defense mechanisms of the ideal popular girl. Hitagi herself states that she has a trouble with resolving things from her past. Hitagi, even before she lost her weight, usually removed herself from difficult and painful situations. She became estranged from her mother as the woman was lured deeper into the cult. After the incident with the cult leader, she traded away her pain and the connection to her mother. After she lost her weight and Kanbaru figured out her problem, she forcibly cut ties and in the cruelest terms possible declared that there wasn't even anything like friendship between them.

Another notable trait of Hitagi's, something she repeats like a mantra, is that she relies only on herself. She will pay her debts by herself. She will handle things herself. A normally admirable stance but in truth one that she's not been as consistent in living by as she might seem. She had developed this attitude even before her mother had betrayed her by handing her over to the cult leader --- she viewed her mother's reliance on the cult as a crutch and thus became that perfect Senjougahara simply to prove to her that this is what she could be without needing a crutch like her mother. It became a painful lesson after her mother stood by as the cult leader attempted to violate Hitagi and she realized that she alone would act to protect herself. After she was repeatedly tricked in trying to find a solution to her oddity, Hitagi faced Araragi and Oshino Meme with hostility and an eye to what she would have to pay. But this refusal to seek or even accept help is made into hypocrisy by the fact that Hitagi hadn't always shouldered her burdens by herself. After all, she had wished to be relieved of her pain and a god had answered.

It is in finally accepting this that Hitagi was able to truly save herself. Though Oshino had neutralized the god, Hitagi insisted in facing up to what she had done. She offered first her apologies and then her gratitude and her request to take back the weight she had been unable to carry. And though it fixed nothing, it fixes nothing the weight hollowing her out with the reality of her losses: her mother gone, her father absent, Hitagi alone, fixing things was never meant to be the point. Some things are lost forever and people cannot suddenly reset two years, saved memory and a girl is whole again. Hitagi Senjougahara doesn't work like that. She's still a girl who backhands with a compliment, a question, a declarative statement. She will still turn menacing on a dime and question her boyfriend's status as a carbon-based life form. Regaining her emotions and her weight can't change her past and her mistakes or who she has become but it does allow for change.

And her changes are these: she's a girl in love with a boy who would save anyone and they find ways to save each other every day. She keeps him from killing himself with his good intentions and he retrieves for her the things she had lost: her friendship with Kanbaru Suruga, her connection with her father. She doesn't carry her stapler as often anymore and she's able to choose her clothes without regard for how they weigh on her. She's learned that distance doesn't always help and that the only thing to do with pain is to live with it, to accept that it is no one else's to carry but yourself.

And her changes are these: Hitagi, who once traded her pain away, saying that that she can be grateful for that pain because it lead her to the person that she loves.

Give her time and she'll give you her timeline (because mapping her change is still something she'll decide for herself) and if you go in despair because she's groping you then claims you're a uniquely deviant existence that it takes a deranged potentially yandere individually to love you, here's the thing to keep in mind:

she talks about love.