We named this cat Ninja because it's the first tortoise shell cat with predominantly dark patches. As a kitten, she was so dark that she's almost invisible at night. That's an almost perfect camouflage and she uses it to her advantage... and to my annoyance whenever the "prey" she's set her eyes on is my foot.
She's not shy around humans and love to use their shoulders as perches (hence the photo above) and their pants-clad legs as scratching posts. She meows to announce her presence or just to greet us when we arrive home. She sometimes also races past me through the door into the house for reasons only she knows what.
Apparently, I'm not the only one to notice this unique tortoiseshell behavior. The blogger of The Conscious Cat has written a piece of what is termed as "tortitude". I am certain that Ninja displays that.