I get it. Sometimes you feel so much sorrow, but you don't know how to cry. The neighbor lost her best friend at such a young age, and it shocked her. Yet she doesn't know how to react to it. You feel so sad, but somehow it never comes out.
But one day it might. One day, you might be remembering your past, see it, and cry your eyes out. But that's not a guarantee.
Tanuki Yuzu still doesn't know much about the world, but right now she probably doesn't want to really hurt people. That's why she's so confused on what to do.