It is not easy to ascertain Cyn's real personality and actual mannerisms, as little is known of her from before her disposal, and after rebooting she has no control over herself due to the Solver possessing her.

That being said, when puppeteered by the Absolute Slover, she comes off as having a chilling personality that unsettles those around her due to her mental and physical deformities. Lacking any normal semblance of emotions, she resorts to using mimicry and imitation to behave like a real person would, speaking her actions aloud, but she was capable of actually laughing.