In "Flying The Coup", Senor Uhl doesn't hesitate to defend the Tarron siblings from accusations they're illegal immigrants. While it seems like an Everyone Has Standards moment at first, it makes even more sense when you remember he’s an immigrant from Austria; it’s very likely Uhl has been a victim of xenophobia himself.
This would also explain why Uhl got so incensed when the term "illegal aliens" is used; it brought up some bad memories for him, and he knows first hand it's not fair for anybody, especially two teenagers, to be called that.
And earlier, Senor Uhl becomes sympathetic to Aja and Krel when they mix in some truth to their on-the-spot backstory, namely the bit about fleeing their homeland because of a coup by a dictator. Again, Uhl is from Austria; while it would have been before his time, it is likely that his parents and/or grandparents would have experienced the Pre-WWII Nazi takeover first-hand.
It's also implied that he knows they're lying about being from a country called Cantaloupia because it's such a ridiculous name. But why wouldn't a war refugee lie about where they're from, knowing they could get detained by authorities, indefinitely locked up or deported back to where they escaped? The Holocaust history and other refugee crises feature that issue. Plus, Jim has been making up much wilder stories.
The Blank Robots being nicknamed Ricky and Lucy isn't only appropriate for the I Love Lucy shout-out and the Akaridion's knowledge of Earth only being from the 1950s. The TV couple consisted of a Mestizo-Latino male character and a blonde Caucasian female character, which perfectly describes the human forms Krel and Aja adopted to hide out on Earth.
It may seem absurd that Varvatos Vex, who has to be a temporary guardian for the young royals, would be the one to have betrayed them. You'd think a military man wouldn't be as stupid to believe Morando when he said no one would get hurt in a coup, given the alien's Obviously Evil demeanor. That's the point of his Character Development though; Vex spends a lot more time focusing on fighting out of passion than on actually thinking. If he had stopped to consider that a tyrant would want potential rivals out of the way, then he would have realized that Morando would never have kept his word. Vex gets slapped in the face with his stupidity after seeing innocents getting killed and knowing it's his fault, and why he decides to take up chess to learn how to plan ahead.
At the beginning of the series, Krel is the one who seems to be taking his responsibility to the kingdom seriously, actually showing up to the coronation while Aja went running around the city instead. It seems like a strange change for them to reverse positions at the end, with Aja electing to go back home and become Queen while Krel stays on Earth. Then you realize what this says about their actual reasonings at the beginning. Krel wasn't really more responsible, he just didn't have anything in his life that he was passionate about, so he defaulted to doing what he was told. Aja, on the other hand, wasn't goofing off because she didn't care, but because she actually understood the responsibility of being royalty, and didn't believe she was ready for that responsibility.
Fridge Horror
How many aliens did Vex get killed by agreeing to lower the shields?
