MAI can be anything from a small fighter plane to a massive aircraft carrier, but the one thing they all have in common is, well, they're all military vessels. If it was a vessel used in war, it's an MAI. If it's a conventional robot like an E-20 or ADU-08, then its simply an LAI. With a quick glance at a group of MAI, it's easy to point out that some models should have an evident mechanical disadvantage over others, such as earlier tanks and various prototype planes. This however, isn't necessarily the case, as upon installation of the vessels' AI, physical modifications were also made to the vessels such as better performing engines and stronger components, improving the units' performance.
Regardless of type, all MAI have some basic anatomy in common. The presence of a box, artificial nerves, optics, and audio receptors.
Growth Rate & Stages
MAI don't visibly age beyond weathering of their vessel, (which can be easily repaired) but mature extremely fast due to their incapability to forget things and quick processing power. This makes learning language extremely easy, and a newly activated MAI could be forming sentences by one to two weeks of age if raised around talkative peers. An MAI, depending on their amount of exposure to the world, can be considered mature at as young as five to six years old, and are capable of living as long as 440 years at the best, and 370 at the least. When nearing the end of their life, it becomes obvious when they just start to... forget things, as this means that the DNA within their boxes that their memories are stored upon is starting to deteriorate, and the longer time passes after the first signs, it only happens more and more quickly. It's seen as inhumane to keep them alive in this stage after so long due to the fact that every other part of them can technically function without the presence of their memories, and eventually, they'd just become an "empty shell." Unfortunately, this means that MAI are incapable of dying naturally, so must be put down.
Ecology and Habitats
MAI, depending on type, can be found just about anywhere. On land? Tanks. In the sky? Planes and helicopters. The sea? You guessed it, there's ship MAI there, too. They tend to stay in and around their country of origin, but as they have free will, they're not bound to stay there.
Dietary Needs and Habits
MAI can run on a variety of fuels. During the third world war, they ran on traditional gasoline, but as time went on, were converted to be able to use more sustainable substances such as plant-based fuel, or even just water or hydrogen. This makes sustaining themselves much easier, and is the main reason feral MAI are so rarely seen in urban areas; they can just find a lake and refuel there.
Physically, MAI don't change much beyond weathering, which is something that can be easily tended to. For feral MAI, though, there's the added plant growth that comes with decades of lack of maintenence in the wilderness.
On average, MAI surpass the average intelligence of a human at about five to seven years of age. As mentioned earlier, the inability to forget things makes learning much easier and faster.
Perception and Sensory Capabilities
Despite lacking the senses of taste and smell, MAI excel with their 40-20 vision and keen sense of hearing. They are also capable of feeling touch at different sensitivities depending on type, (tanks don't feel quite as precisely as planes or other vessels with thinner armor, whom are able to feel things as small as individual pebbles) but can only feel varying pressures, and are thus incapable of feeling pain in the same manner as we do even if they can differentiate it from regular, non-harmful contact. MAI have a peculiar quirk in that they can read micro-expressions on people. This tends to make MAI come across as particularly emotionally intelligent, when really it's usually just that changes in facial expression are much more obvious to them. Some, though, do like to hone this skill and apply it in either their personal lives or career paths.
Civilization and Culture
MAI are assigned an ID number upon activation that will be used to identify them for the rest of their lives, but many were also given a traditionally human name to go with it: either by assigned crewmates or those that activated them. (Meaning that there are still MAI that legally only go by their IDs) Most units with human names have pretty traditional ones, such as Jack, Charlie, Lynn.. you get the idea, but you also get some that were named after places, brands, or other things that aren't conventional at all, like Fargo, Chevy, Volant, and Cabela.
MAI don't always identify as anything, but it's certainly not uncommon to find ones that do. As they're able to freely modify their voices, its mainly conveyed through that or cosmetics.
Relationships are generally widely accepted within the MAI community, as they are capable of feeling romantic attraction and are a very social 'species,' but in some places, it's not all that rare to find an MAI romantically involved with a human. Some groups view it as taboo or just plain wrong, but it really is just two consenting parties with compatible levels of intellect, and the whole "MAI brains were made to mimic human brains" thing is important to remember here.
Major Language Groups and Dialects
MAI can speak any language they so please if they're willing to put in the effort, but the most common first languages are English, Spanish, Russian or Mandarin Chinese, and although it's not a first language, the primary language for MAI to one another is Clicktone; a language compromised of various clicks and beeps that allows for fast verbal or transmitted communication. This is the most commonly used language among feral MAI as they so rarely come into contact with humans.
Common Customs, Traditions and Rituals
A common custom among MAI is celebrating the day that most of their kind were activated. This is particularly special for American and European MAI because, well, most of them do share the same birthday. A surprisingly large majority of MAI were activated on Dec 31st, 1995, so not only are the birthdays of these units celebrated, but there's also New Year's Eve, so combo holiday! Other commonly celebrated days are the day of the year that marked the end of the Third World War, and the anniversary of the conception of Livastia.
The main taboo associated with MAI is the ability to be romantically involved with humans. This is obviously unavoidable as humans couldn't even accept different races and sexualities as equal for the longest time, but just like those, this is something that gets mostly stamped out with time.