Maybe I should explain why I included the Protector in this conversation before it became a big dumb meme. So let's pretend reproduction is completely off the table for the sake of it being a toy line for now because it's the least important part of my argument anyway. What we have, for five seconds, is a villager, like the rest but smaller. I think we can assume they are a younger villager because they are smaller they are wide-eyed and full of wonderment gazing at our hero Tahu for the first time. They are implicitly standing in for the target audience of Bionicle, the children. The tiny villager is us.Wow I'm sure blowing a lot of minds with THAT revelation, eh? Well pay attention, this is where I actually get interesting. SO what we have is a young villager. From this we can assume they will one day become an adult villager. GROUND BREAKING STUFF I KNOW okay but how does that growth happen? Do they just add on parts like a robot? Take a look at that baby villager again. Look at his proportions. Even cartoonishly depicted, the scale of limbs to head to eyes to body are not the same as the adult villager. The eyes are almost the same but the mask itself is quite a bit smaller. The limbs are slender but the armour looks to be similar in size. I posit that the villagers themselves actually "grow" very similar to how children do. The bodies elongate with little expansion in width. The eyes retain size but the head grows in size too. But the mask? I suggest to you that the mask does not. My evidence? Ekimu. He is a mask maker. But since everyone's face is the same, I doubt he's making a lot of spares if his official job title is Mask Maker. Ekimu and Makuta make masks for the villagers because they keep growing out of them and require replacements every so often. So what does this mean? The baby protectors grow. They are clearly somewhat robotic, but they are able to mature from a smaller state. And despite what Ultron McSquishyvibraniumface would have you believe, metal just can't do that alone. It needs the assistance of good ol' fashioned organic material in the mix somewhere. But hey, that's just a theory.