Honestly, nobody is friends with her. She's not a nice Tokota, having gone from raising herself in isolation because she was abandoned as a puppy, to having attempted murders on her, to being black mailed into being an assasin for another. She has completely blocked herself off to any advances at friendships. To Darkness friendships are stupid and pointless. Seemingly a phantom, as her name suggests, she sneaks around silently and often times others don't know she's there. She has a bad habit of ripping out the eyes of her enemies, hence why she is called Blinding Phantom. She is rather heartless, and often times cold. Darkness doesnt hesitant at all when even the smallest threat comes to play. Death isn't anything new to her as she is very much used to watching the light fade from others eyes. She is kind of odd in her mannerism having raised herself and not much interaction from others. The only tokotas that can get close to her are Moulin and Baphomet who found her when an assasin mission failed and her "master" nearly killed her. These two nursed her back to health and she has not left their side since. If you mess with her two saviors you're in for chaos. Darkness has known a life in the dark and chances are she will never come out of it because of the trauma and secret fear.