>>8459288>>8459579>>8459640Remember from Mori's debut stream that the death of concepts, namely J-rap, absolutely counts.
And that, according to Kiara's stream, she would often reincarnate to different dimensions after her deaths.
Thus, we can safely assume that shinigami in general are capable of killing more conceptual beings like the Council, and that they can track their prey between planets/dimensions. Which isn't really that big a step up for Mori, when she's already capable of delivering her 20-second voicepack speech to the 120 humans who die every minute, which requires some level of duplication/time manipulation/other bullshit-level powers.