What Kaspar wants is an ending akin to tragic love.
From a perspective of social morality and the continuation of one's race, this behavior should not be encouraged. Prioritizing personal matters while executing missions or even putting private affairs first is even more unacceptable. At any other time, not to mention the Emperor, even Nidhogg would have intervened to deal with him.
Now, the reason he is allowed to act recklessly is nothing more than the fact that the World Restart is imminent, Kaspar has little time left, so letting this chess piece play freely might as well maximize its function.
"Whether loyal to the Emperor or to one's personal desires, until the last moment, one must play the role of the chess piece. Life... as he said, is nothing but the shadow of a clumsy performer."
Victoria sighed lightly.