From a simply logical point: there is one type of cat that is unable to retract their claws: cheetahs.
So if they can live without accidentally hurting each other in their sleep, I guess Tetra can do it as well.
Also, a little scratch when asleep ain't nothing to be worried about.
And when being like that your whole life, your subconsciousness learns not to have accidents happen.
Just like you learn as a child not to fall out of bed.
Isn't she supposed to be a tiger tho? Well it's not hard to imagine a beast species which is a literal mix between human and animal to mix different types of animal traits in there too.
maybe her human trait stops her from retracting her fingernails
This manga is gold and i like Tetra
But if Tetra is a felyne beastman then shouldn't she have retractable claws?
Seeing her walking around, doing chores, and sleeping atop Kane with those curved sharp claws is making me worried she will accidentally cut someone
Like, I'm expecting the situation where she accidentally hurt someone is givinge anxiety ╥﹏╥