TERRAPLANE
In general, the weapon can be anything, but please remain consistent with your character's outline. (:
Ah, but this might have been something worth explaining, lol.
CONCERNING TECHNOLOGY
Also, as a quicker and easier read, if you sincerely cannot envision Terra, but have played FFVII or FFVIII or FFX then feel free to reference THOSE worlds. The world of Terra is VERY similar to all three of them and, in some cases, can even be argued as a combination of the three. Of course, for those who have not played those games, feel free to just continue comparing the world to our world.
A good rule of thumb, when confused about the technological limits of Terra, is to ask yourself: Do we have this in our world? Is it possible, currently, for this type of technology to exist?
Generally speaking, in terms of technology, Terra heavily mirrors our reality. The only real difference between the two is that Terra has the crutch of magic at its disposal. Therefore, you guys are awarded some freedom to be creative with technology. So, to answer the popular and frequently asked question: What kind of weapons are citizens of Terra using?
Answer: It can be anything from the standard heroic broadsword to high-tech, brains-bashing guns.
Of course, if you decide to use military-grade weapons, you'll be responsible for explaining (logically and plausibly) how your character(s) came to possess them.
However, with that said, there are differences (some slight, some major) in the level of technology available in the seven regions. I'll briefly explain the level (and reliance) of technology available/present in each of the regions.
NOTE: It should be said that the basis for most nations (unless otherwise specified) is meant to assess military technology.
Country of the Sun: Technology in the Country of the Sun is comparable to present-day China. Technology is available and it is decently (if not equally) competitive to the other technological nations (e.g. the Country of the Air, the Country of the Rain, and the Country of the Metal). It should also be said that they have the largest military of the seven nations. In respects to civilian technology, the Country of the Sun has access to a form of internet (high-speed, etc), but, much like present-day China, it is highly censored and restricted. Every night, at roughly 0300, the Sun servers are swept by a program (known as Eclipse Net or EN) that checks for "inappropriate" content and blocks it from access. It also takes down proxies and the likes.
Country of the Rain: As one of the leaders in advanced technology, the Country of the Rain invests heavily in civilian technology. In the whole of Terra, the Country of the Rain has the most advanced phones, televisions, and is the primary producer and designer of luxury sports cars. Moreover, as a courtesy of their force's ability, the Country of the Rain has also further advanced their health departments. In terms of military technology, the Country of the Rain is less impressive, but can still manage to deter the other nations from seeking war. Due to historical incidents (several other smaller skirmishes and wars, post-Xerathe, between the Country of the Sun and the Country of the Rain) have left the two nations at odds with each other. And, as a result, it is believed that the Country of the Rain has missiles (defensive) directed against the Country of the Sun. Politically speaking, the two nations do not have the best of relationships.
Country of the Earth: As a mainly agrarian society, the Country of the Earth has few and little needs to seek out wildly developed technology. Keeping true to older traditions, the Country of the Earth relies heavily on their forces for daily and long-term needs. While the nation has access to modern weaponry (courtesy of imports from the Country of the Metal), they are not necessarily completely up-to-date. There is a growing movement within the more urban parts of the Country of the Earth that seeks and demands greater integration into modern technology, but the ruling family has overrode any attempts at further integration. When it comes to civilian technology, the Country of the Earth is very "diverse." Citizens of the urban areas (major cities) enjoy a lifestyle similar to the other integrated nations), but as the Country of the Earth is still largely farmers (and the likes), most citizens live day-to-day without much internet access. Televisions are commonly small and clunky (flat screens? You're in the wrong nation) and computers run on 56K dial-up.
Country of the Air: The Country of the Air is a highly commercialized, industrialized nation. Of the seven nations, the Country of the Air has the lowest admission of forces into the academy, but makes up for the deficit by investing heavily into technology and, in the last decade, "stealing" forces from other nations to help. To make this easier, the Country of the Air is, in a lot of ways, highly comparable to the United States of America (but minus the unipole status). While it is true that the Country of the Air does mix force into their technology (a great portion of their energy source, perhaps over 80%, is reliant on the air attribute), most citizens have simply grown to be accustomed to living without the fun of a force.
Country of the Metal: This is, perhaps, the most militaristic nation of the seven and, as such, invests a huge portion of their annual GDP into defense funds. Their weaponry is top-grade and the nation's greatest export is their military technology (although they reserve the best for themselves). Much like the Country of the Sun, the Country of the Metal also employs heavy internet censorship (they use a program known as Iron Wall or IW to scan the web). The cities themselves are also highly decorated with technology and, aside from trading arms with the Country of the Earth, the Country of the Metal also share a very strong economic alliance with the Country of the Air.
Country of the Hollows: The Country of the Hollows have a peculiar living situation. Due to their cities being underground or embedded into the mountains, the Country of the Hollows rely almost entirely on their attribute for survival and sustain. Dark matter or energy is said to keep the earth from moving and collapsing onto the underground nation. While there are things like computers, phones, and cars in the Hollows nation, most of its citizens use only Hollows' technology (goods that are comparable to regular technology, but made to only be compatible with Hollows energy). This self-reliance came about as a result of consistent governmental ruling and citizen beliefs that outside influences will, one day, cripple the nation. As a general note, the Country of the Hollows is not necessarily a "friendly" place for foreigners. Visitors or tourists, kept within tourist regions, are acceptable and welcomed, but permanent residents are heavily discriminated against.
Country of the Sky: The level of technology available in the Country of the Sky is disparaging. Due to the wide gap between the haves and the have-nots, technology is only truly available to those who live in the Upper Halls (the Upper Halls are very modernized, but influences of Sky Forces can be seen everywhere). For a quick picture, imagine the Upper Halls to be an extension of the Air Nation). In fact, the entirety of the Upper Halls is kept floating by force energy. In the Lower Halls, technology is still evident, but run-down and broken. It is, after all, the slums of the country, but people get by.