The Xenoblade Chronicles series is an interesting one, with very few things seeming in any way similar between games, outside an incredibly elaborate UI and massive areas waiting to be explored. Like really, truly massive. The original title is about two giants people live on, while Xenoblade Chronicles X is about aliens and is completely disconnected.
In Xenoblade Chronicles 2, the combat and character designs are a drastic departure, having a more traditional "anime" look, with undeniable harem vibes, and combat revolving around Drivers and Blades, the actual weapons you use. You can evaluate them on plenty of things, but the design is the most stand out feature.
10 Dagas
Dagas is, quite simply, an awful, annoying person. There's some tragedy locked away in his story, the belief that he is a king of a long-lost nation, though being a blade means he should have no memory of such a thing. Nonetheless, he is convinced, and is kind of an ass about it, acting shocked at your disrespect towards him.
And yet despite that, he has an undeniably unique design, one that has basically no symmetry to it. Like seriously, the man seems to just have every piece of him different. His cape flowing to one side, half his face covered in cloth, one leg of an ethereal glow while one arm is heavily armored. It all echoes his personality.
9 Crossette
Crossette is a fun Blade. Being a DLC blade, she doesn't have any heart-to-hearts, meaning all of her personality has to come through her actions, animations, and blade quest. Despite that, she still leaves an impression, adoring Pyra as an idol and Mythra as...less so. She's also deeply kind, helping anyone she can.
Crossette is also incredibly excitable, and this is shown greatly in her design. She's all about explosions and fireworks, and the joy of it all. She dashes about with skates on (or part of) her feet, firework balls around her belt ready to be thrown. She's jovial and light-hearted, and her design just exudes fun.
8 Godfrey
Godfrey is a fun character, a Blade encased in what he would claim is a righteous blue flame but is instead a deep, crystalline ice. He is staunch in his view of black-and-white morality, a constant striving for justice in a world where things aren't so simple. He's honest if a bit naive.
But his design exudes the energy he wants to be. Cool, literally cool, while looking like a burning flame. Someone with power and impulse. And yet his hair contrasts it, sharp and pointed and a flaming red, and all with a smirk on his face. In fact, his face is the only part of his bare of his suit, to show his heroic visage underneath.
7 Adenine
Adenine is really quite the definition of "Knowledge is Power". She's a healer, but one of the strongest, focusing on keeping you alive through force rather than a gentle caress. She is a voracious seeker of knowledge, quite simply for the sake of it. In fact, following her blade quest, all her free time is spent researching.
Her design evokes her personality even more. Much of her body is made of the wrapped pages of books, some almost legible still. At her center is a hollow, a place for knowledge to fill her in that will remain empty for eternity, considering her endless hunt. And in case she wasn't literal enough, she literally wields books as weapons.
6 T-Elos
T-Elos is quite a lot to take in. Added into the game in an update for new game plus, she doesn't have a heart-to-heart. Though unlike other Blades added later, her personality and character have a bit of history to them, and she's based on the identical character from Xenosaga, her rivalry with KOS-MOS and all.
The design of T-Elos at the same time isn't actually unusual for the game. She wears all purple, thigh boots and short dress to match. Part of her helmet contains a visor that she'll activate at times. All of this paired with a real big scythe to cut down anyone who dares to talk back to her.
5 Finch
Plenty of the Blades here are either human, humanoid, or some mechanical thing. Which is pretty understandable. But Finch is, quite simply, a bird girl. She's slow, forgetful, and easily excitable. In fact, her heart-to-heart revolves around wanting to see snow, forgetting she's seen it, and being delighted when she sees it again.
But being a bird girl, she's got quite the standout design in the game. Colorful plumage adorns her whole body, excluding the face. But instead of a beaked face, she has a smoother face with her goggles imitating the beak she doesn't have. Funny for a bird to have aviator goggles, but maybe she'll forget how to fly?
4 Herald
Herald, as the name implies, is a herald of destruction. Which sounds pretty cataclysmic, but she was literally sealed away for going berserk and destroying a temple, and has begged for atonement ever since being awakened. In fact, she even loses control again and has to be fought, this is finally convincing her she's in good hands.
However, it's no surprise that she has so much power considering her design. She quite literally has a mech. In fact, she herself is rather simple looking, with a skintight suit and a horned helmet. Her Bahamut-looking mech is what makes her shine, an ill-omen soaring above you ready to rain destruction.
3 Azami
Have you ever played Devil May Cry and been freaked out by the marionette enemies and the almost invisible strings suspending them? Well, that's Azami, but much more inescapable. She's obsessed with her Driver, never wanting to be separated from them, with allusions to control them to keep them there.
The concept of control makes sense seeing as she's herself just a puppet on strings. To further the metaphor, she's actually entirely porcelain, and a clean gleam comes off every part of her body. She also has the cage of a hoop skirt around her, adding to the gothic horror vibe of her whole design.
2 Perceval
While someone like Godfrey had a very black-and-white view on justice, Perceval is more nuanced. In a past life, he was merciless, doling out punishment by death with glee, thinking it was the ultimate penance. He has mellowed now, in a way at least. He still believes in atonement, though now believes that living is a greater penance than death.
His design is interesting and strikes fear, truth, but not an immediate sense of justice. He has many motifs of samurai generals, from the katana, the styling of his helmet, and the flags wavering on his back. He demands respect, not through words but through appearance. He appears demonic and rugged, but his personality reveals it's something of a facade.
1 Newt
Newt is...a lot. Her personality is pretty simple. She is fanatically obsessed with weaponry and machinery. It's frankly well past the point of interest. She's incredibly militaristic in an almost satirical way, her obsession has gone past effectiveness and back to the base mechanics, even just the idea of weapons.
Putting her love of created power to use, she uses her oversized muscular arms that float beside her during combat to wield her weapon. Despite the fact that she's so incredibly muscular herself, she only uses her floating arms and her design leaves nothing to the imagination. It can be argued that it's a sexist design, but there's something so hilarious about the boldness of it that makes it unforgettable.