I don't have a backstory, but I'm thinking it'll just be a rahi.
A very over-dramatic rahi.
Standing at 22 inches (54 cm), this is the third giant I made, the Skakdi warrior, Kyrakk.
With his Wingblade, three-shot Zamor Launcher, and heat-vision, he is a worthy opponent even for Mata-nui himself!
Many beleive him to be a myth, as nobody has seen him and lived to tell the tale in 10000 years. He is also entirely insanse, mercilessly slaughtering anything he sees.
Here we have the middle-height giant, standing at 16 1/2 inches (42 cm) tall, the Toa of air, Lahkor!
Essentially a walking armory, he weilds two greatswords, a Kanoka launcher, an axe, a scythe, a hunting knife, a Nynrah ghostblaster, and a massive flamethrower, as well as being skilled in hand-to-hand combat.
He wears a Kanohi Kualsi, mask of quick travel, allowing him to escape battle if wounded, and keep chasing an opponent endlessly with minimal effort.
Here is my first giant! Standing at 18 inches (44 cm) tall, he is the great being, Deitos!
With three lengths of swords, and a giant transforming pickaxe, he is truly worthy of the title "Great Being".
As a Great Being, he is capable of using all 42 Kraata powers, every mask power, every elemental power, every Kanoka power, and every Rhotuka power.
A word of advice: there's only so much you can achieve by elongating the torso and/or the legs. At some point you just need to break that scheme and work on poseability, or you'll end up with your giants looking like they're wearing rigid busts. Still, nice collection here :)
I'm sure a way to fix the Skakdi's torso will suddenly come to you when you're doing something else completely different. Happens to me all the time :P All of these are great btw. Th first one kinda reminds me of Wheelie from Revenge of the Fallen...