
physical traits or behavior? bc for physical stuff you could give them nictitating membranes that peek out when they’re relaxed, or have their eyelids dilate not only when excited but also when angry or afraid. as for behavior, sometimes cats purr not only when they’re happy but when they’re anxious as a self-soothing method, and cats also find eye contact intimidating and thus turning away from someone can be a sign of trust!!
I’m not sure about wild cats but I know some domestic breeds will make noises like clicks or chitters that mimic the noises their prey makes so they don’t alert them to their presence, maybe a moment demonstrating that? Or noticing traits in a room that the average human eyes might not catch? OOH are cats colorblind? Cause I know dogs see colors differently because of the amount of cones in their eyes or something so maybe moments of the feline character(s) misperceive some colors?
this stuff is just what i know abt housecats though, there’s probably other fun quirks you could pick up from wild cats species :> i also just remembered that cats tend to instinctually hide when sick, in pain, or even dying to avoid being targeted while vulnerable, and are also often relaxed by small, dark, enclosed spaces (my cats love tiny blanket forts, and when catching feral cats for TNR i often see people put blankets over the cages to calm the cats down)