Imposter - Bitter - Toxic
Stain is a dangerous and vengeful spirit. Which is not fully her fault alone. Mindhunter being her creator only helped in destroying an already damaged soul and mind.
There is nothing to be gained by trying to come into contact with her. All esk that have dared to try, worry that her personality might contaminate and corrupt them. She has nothing to give aside from hatred for the world, and believes everybody should suffer as much as she does.
She has an incredible abusive and toxic relationship with Mindhunter. Should you ever encounter these two esk when they are together, it's best to run as fast as possible. As they love nothing more than tormenting other esk. Esk might not be able to harm each other physically. Oh, but harm to the mind and soul is so much more devastating, and these two have mastered this "art".