-- "Kanan's gone."
Death is tough. I think there are not enough representations of it in media intended for children. And I get why: Parents don't want to deal with it and the questions it causes and having to try and explain what it means and... well, I'm sure you get the idea. It's a difficult topic and, even in fiction, it can be hard to process. And not just for children.
However, seeing how fictional characters handle death can be a good learning experience for kids. We get a wide range of examples here in Rebels.
Hera is busy blaming herself.
Ezra is lost and in despair.
Sabine and Zeb want revenge.
And the loth-wolves... Well, they want something, too.
We also get to see a little more of what Rukh can do in this episode as Sabine and Zeb end up going toe-to-toe with him.
Oh, and Thrawn? You'd expect him to be happy about the death of Kanan, right? Well, Thrawn will always surprise you.
This last arc is just something you need to watch.
"Expect them to strike out recklessly, and when they do, eliminate them."
"The Empire and us? We're not even yet."