Highly recommend reading the kid's book Star Wars Rebels: Battle to the End. Takes place when Kanan is captured. Some of the chapters are actually from Agent Kallus' point of view!!
Kallus: I think I’m coming down with something, I’ve been feeling nauseous lately.
Eli: Maybe you’re pregnant.
Kallus:
Eli:
Kallus: I don’t know who’s the bigger idiot right now; you because you suggested it, or me because I just had a heart attack.
Eli: You just fucked with a Lasat, it wouldn't be too farfetched.
Will never be over Kallus’ first name being Alexsandr
I can just imagine the process of them deciding on that name:
“We were thinking of having his name be Alexander but it’s just not spacey sci-fi enough..”
“We could make it more spacey by fucking around with the spelling?”
“That is the best idea ever, let’s call him Alexsandr.”
Also why is it just never mentioned in the actual show?? We were robbed of someone (*cough* zeb *cough cough*) calling him Alex because there is absolutely no way that he continued to go by Kallus after defecting
One thing that really grinds my gears when it comes to the discussion of Rebels is the consistent misrepresentation of Kallus' redemption for ship purposes.
Kallus' redemption arc is not about Zeb. Yes, Zeb kickstarts it, but he did not make Kallus a rebel. And I find it so irritating when people reduce his arc down to "haha he fell so in love he switched sides" like please.
For Kallus' redemption to work, for it to be worth anything, Zeb cannot effectively be a part of it. The entire point of Zeb telling Kallus to search for the answers to questions he hasn't asked is because Kallus needs to see it for himself. He needs to realize for himself. He needs to realize everything he's been a part of.
And that's why I dislike it when people woobify him and turn him into this character who's constantly asking for forgiveness from Zeb. Because even aside from the fact that it's just weird to put Zeb in the position where he needs to constantly forgive the guy who was complicit in his planet's destruction, that's just not what the arc is about.
Kallus looks for the answers. And in the end he's more aware than anyone what he's done, what he's been a part of, and that it needs to be fixed. He's not a soft character and his redemption doesn't change that, it just means that he's changed his actions to be consistent with his morals. Zeb is not guiding him or teaching him or even present for most of it, and that's important.