Xam'd : Lost Memories aka
Bounen no Xamdou aka
Bounen no Zamned aka fuck that shit, it's got too many names

Akiyuki is an ordinary highschool boy living on the quiet Sentan island along with his separated parents, and his two best friends Haru (female) and Furuichii (male), when someday he helps a mysterious white haired girl trump the security to get on their bus for school. During the trip, Sentan Island is attacked by the Northern Empire by using Humanforms (= magibiotech weapon that transform ordinary people into huge rampaging monsters with flashy colours) and the white haired girl has their bus explode and puts a Hiroki in Akiyuki's arm that makes him into a Xam'd, a smaller scale rampaging monster who starts fighting with the Humanform, causing much damage to the city. Haru runs after him to help him, without success, until a mysterious girl (another one), Nakiami (aka 'Second Coming of Nausicaa'), shows up, gets Akiyuki to turn back into a human and then kidnaps him onto.... the Postal airship where she lives on, hoping to teach Akiyuki to control his Xam'd ability so he doesn't turn into stone and die. Meanwhile, the Southern country already at war with the Northern country allies itself with Sentan island and sends military forces there as well as a team of researchers into Humanform technology.
Xam'd is a show with excellent production values, awesome characterisation, compelling drama and a story that doesn't make much sense at all.
The character design is lovely and vivid, the animation ranges from excellent to stunning, and the soundtrack is wonderful. I also loved both generics, Boom Boom Satellite who made the OP music is my new favourite band ♥
There are a lot of characters, and the story doesn't shy away from developing and giving their own agency to characters who could have seen as fairly minor or secondary. Akiyuki's parents are fairly well developed for example (and pretty damn awesome), so is Haru's sister and most of the characters on board of the postal ship. This throws up the story in a lot of interesting, complicated directions although it's also what made the story lose its focus. The main cast is also very endearing : Akiyuki despite beint your ordinary young male lead has a sympathetic personnality you can relate with and is willing to learn and grow very easily. Nakiyami, being Nausicaa Lite, is of course fairly awesome, determined and strong, empathetic, and very much badass. Haru despite being in the designated Love Interest role is a fairly interesting character with a lot of agency and backbone. However sometimes characterisation intersected with the WTF-ness of the plot in ways that were odd and disappointing, concluding a character arc in unsatisfactory ways or making some of them rather inconsistent.

The world building remained a little bit too vague and kitchen-sink-y trough most of the story. On the one hand there's the way they drop so many kind of elements in there : highschool students, aircrafts, a war, magitek and biomecha and what nots in ways that felt very... video games-y? I dunno, it didn't feel like there were much consistency to it, especially since there were very little exposition or explanation, and the underlying mythology that bears the story was very much confused and near-ununderstandable (still not sure there was actually something to understand). Despite this, thanks to the quality of the animation and soundtrack, it's very vivid and awe-inducing.
The plot meanders in weird ways. With good dramas, so I can't say I was ever bored or not enjoying myself, but in ways that are utterly baffling at times. Where do they go with it? Who are the antagonists? Who are the protagonists? What are the sides of the war? Exactly what roles do the Tessik, the token Magical Discriminated against people (that Nakiami belongs to), play in this and what is their past? Who are the white haired children and how are they related to the Tessik and what is their plan? Who does the Postal Ship work for exactly and do they have a mission asides from mailing stuff which explains how badass they are? I'm not really sure what's the answer to most of those questions after watching the show. I'm not sure there is one.
As a result, the themes aren't much clear or well developed either, there's a nice compassionate heart to it, where killing people/creatures that were once people is seen as bad/sad. There's a nice motif of letters / communication which is kind of cool if fairly aimless. And some more vague stuff about how war affect a population. And how embittered discriminated minorities shouldn't succumb to rage and stuff -_-;. And some disability fail which was fairly wtf x_x. So yeah, nothing great on the theme front.
One of the thing that amused me about that show was many of the similarities it's got with Eureka 7, another Bones show which I dropped after watching more than half of it. One of the thing I disliked about Eureka 7 was how tight the focus was on the main idiotic male character, and how other characters relate to him (and his family), with the large cast of otherwise cool characters having very little agency - Xam'd shows the flaw of going the opposite way, although I still like it better that way (at least Xam'd doesn't take more than 15 episodes before it first passes the Bechdel test, for example, and some of the female character's story in Xam'd aren't about male characters at all *gasp*). Of course another advantage Xam'd has is that its main character isn't utterly stupid. I assume Eureka had, in the end, a much better mythology/world and more consistent story and worthy ending though I never got up to that, based on how many people like the series.
In the end, I found Xam'd to be a very enjoyable show at the I was watching it, but when I think twice about it, I am disappointed by the waste of potential that a show with such gorgeous production value and promising characters ended up with.