"history lives in us, whether we learn it or not."
helly despises being trapped from the moment she wakes up because helena despises being trapped, and her animalistic panic and urgency are manifestations of helena's deep-seated trauma.
helly's exposive anger and fight for control are helena's decades-repressed anger and conditioning herself into surrendering control. even helly's commitment to slouching is rooted in helena's rejection of the perfect manners she's been forced to emulate.
helly uses the most cult-like metaphors and conjectures -- "am i livestock? are the numbers bloody? do they chant? we're all covered in blood and i'm wearing your face, and that's a very powerful image to me" -- because there's a subconscious part of her that is aware of the violence of the world she was born into, and has been taught to use violence as power.
helly craves mark's approval when completing tasks because helena craves the cult's approval when completing tasks, which is a natural emotion of wanting to be accepted and appreciated by your community (and helena cannot choose her community, this is all she knows).
helly's acerbic wit becomes a lethal weapon in helena's hands because helena has always been surrounded by people who want to use her and has honed her mean streak into a defense tactic, rather than the bond-strengthening banter helly uses with the people she loves.
when embodying helly, helena slowly reclaims the parts of herself she's had to kill to survive her environment -- her reckless humor, her criticism of the cult, her longing for love -- setting her on a path to reconnect with her truest self and become bold enough to reject the only world she's been told she should live in.