Wanted to try something new in terms of job threads

[Seiryuukishi]

So I have seen a couple of Job/class threads on here since I have been playing and while it is nice to have an idea of what people are looking for as it shows SE some things we want, I'd like to take it further. Let's get started by me pointing out the criteria of what I am looking for:

1. Name of job
2. Role it fills
3. Origin of job (i.e. country of origin)
4. Some lore behind it.
5. Come up with a skill that is unique to the job but is balanced.
6. Pick weapon
7. Expansion you would like to see it in (let's be realistic)

The job can be something that already exists in the Final Fantasy series or something new altogether. Feel free to post more than one idea. I myself will post one separate of OP for the sake of clutter and so this will be a stand alone guide. Let's do this!