Jiraiya-sensei: Teacher, I Won’t Let You Pass

Just "borrowing" Chakra? As she watched Mito gradually approach, the Nine-Tails secretly breathed a sigh of relief. But it quickly grew angry at itself for thinking that. What "borrowing"? This was clearly robbery! What was there to be happy about?! Humans who wanted to use a Tailed Beast's Chakra either had it given directly by the beast or seized it themselves as Jinchuriki. Mito had robbed it plenty when she was young, and even in her old age, she still refused to let it go!