#vld s2

While we've definitely seen Keith cry, we've never actually seen him shed tears. 7x1, “A Little Adventure,” (seen above) is a really good example. When Allura tells Keith that Shiro might not make it, Keith’s eyes start quivering, and his voice gets all choked up. The subtitles even say "[sobs]" – but his eyes remain totally dry. This show is very fond of making characters' eyes well up, so it isn't a matter of animation convention – of all the paladins, this dry-eyed crying is specifically a Keith thing. Since I can't remember ever seeing a Galran shed tears, I'm gonna go ahead and hypothesize that they just... can't (but if I'm forgetting something, please let me know).

Protective inner eyelid (translucent, yellow).

When I mentioned the 'no tear ducts' hc to my friend, he suggested that maybe Galra have a protective inner eyelid instead. My immediate thought was that maybe this was what gave their eyes the yellow tint. They could very well just have yellow scelera, but we know from 6x5 “Black Paladins” that Keith can blink his scelera from white to yellow to white again, and Zethrid's damaged eye in s7 is clouded over white instead of yellow – possibly suggesting the natural color of the eye beneath.

So if Keith has a physical inner eyelid, rather than some magical Galra-rage transformation that turns his eyes yellow, why don’t we see it before the fight with Shiro, and why do we never see it again?

Theory: The process of lowering the inner eyelid is manual, like winking, not automatic, like blinking. Most Galra learn how to do it as children, and find it effortlessly simple, but Keith grew up not even knowing the extra eyelid was there, much less how to use it. After spending time with other Galra (either the Blade, or his mother), he learned how, but he’s not very good at it. He can use it, sometimes, but he can’t quite keep it put the way other Galra do most of the time.

When Shiro punches his helmet off, they’re on a space station high up in the atmosphere; there’s dust and debris and all sorts of things flying about, and it makes sense that he would want to protect his eyes -- but the moment Shiro distracts him by calling out his aggression, he loses his focus, and his eyes blink back to their usual appearance.

(As an additional headcanon, the thickness of the third eyelid varies from Galran to Galran and can distort the appearance of the eyes, which is why some Galra, like Thace, appear to have no irises/pupils at all; some, like yellow-eyed Keith, appear to have narrower irises/pupils than in reality, and some, like Krolia, have similar irises/pupils to humans and Alteans)

Based on Science (Cross-Species Hybridization)

Can't have biological kids. Typically, offspring of two different species are not capable of reproducing, due to inheriting different numbers of chromosomes from each parent. There are some exceptions, but they tend to be in cases where the two parent species are very closely genetically related, and somehow I get the feeling that humans and Galra... aren't.

May or May Not Be Galra-Heritage / Species-Hybrid Related

No facial hair.

While I’m totally here for trans Keith hcs, if we strictly follow canon, we did see his parents naming him as a baby, so he’s probably dmab. Yet, after two years in the wilderness, from around ages 19-21, there isn’t a hint of stubble on his face -- which, like the dry crying, isn’t an animation convention, because Shiro and Sam both grew facial hair in “The Journey” and Sam’s time as a prisoner, respectively. Galra can grow beards - Warlod Ranveig has a spiky mutton chop situation going on -- but since Keith is a two-species hybrid, it’s possible he has some unusual chemical balances that mean he doesn’t present traits that both of his parent species do -- in this case, facial hair.

(I know not everyone can grow a full beard, but he has very dark hair and very light skin -- even the slightest bit of peach fuzz would leave a visual mark)

Psychic Powers. Keith is almost definitely at least a little psychic (I'll go into that more at some point, but short version – sensed the energy of a lion that wasn't his, often responds to things the moment before they happen, was able to pinpoint Macidus's next location by just closing his eyes and feeling for it), but I'm not sure if that's connected to his heritage in any way.

No Canon Basis (Just for Fun)

UV Vision. The Galra ships are so... dark. It's really not conducive to any kind of efficient work. They're also very purple. I think it'd be kinda neat if Galra can see further into the ultraviolet spectrum than humans can – so their ships look dark to us, but the Galra can see just fine. And it’s fun to imagine Keith growing up in the desert with UV vision although maybe not if he doesn’t know how to use his protective eyelid.