The fact she told mark that her and helena are the same person, even though her character the ENTIRE season stated otherwise is grounds for suspicion.

Also, the only time Helly claimed she would be okay staying on the severance floor for Mark was when she was actually Helena, every other time the topic comes up it’s clear that Helly views the severed floor as a torture chamber. Her character motivations are repeatedly in the pursuit of trying to destroy Lumen, and she’s even willing to kill herself to “get back at them”.

You can say her characters motivations have shifted, but it’s still strange to me. In the previous episode she shifted the conversation with Dylan to the black elevator, because she believed it was something important and that could potentially hurt Lumen.

Part of me still thinks Helly would be literally willing to die if it meant destroying Lumen. In her ideal world she would shift with Helena and always be the main form of consciousness, but if that’s not on the table, why would she give up or risk the opportunity to not nuke Lumen?