He stands, looking into the river. Sometimes, he feels he is the river, part of an insurmountable whole dragging humans to their inevitable deaths. Times like this, it doesn't matter how little he wants to hurt them, how much he loves them, he has their deaths on his hands.
The blood should be more visible than it is, but no matter how many times he cuts himself, it never stays. The dead heal much too fast.
It doesn't matter that he loves the humans he has to kill, he still kills them, because what else can a shinigami do? After all, it's his fault that the people he loves leave him, his oddities and his guilt. It's his fate.
He couldn't even keep a partner, at least, not the one that mattered. That's his fault, too. And if he's partnerless now by choice, it's because he'd just end up hurting anyone who got close to him.
He never meant for it to end like that, but that may be the point. It was neither his ending, nor his doing. But he still believes, deep down, that Tsuzuki's death in Kyoto was his fault, and Hisoka will believe that for eternity.