Sama connotes respect, and Dono connotes great respect, IIRC.

In any case, will the next chapter begin with the kenjutsu tournament?

next chapter. Every time i've heard Dono used it gave me the impression it was more personal and less respectful. More respectful than Chan and kun, but less so than sama and san.

Fair enough, yes.

What would I do to improve my spell power/spell casting ability?

If I can't do that, what would be good to have?

So... now that I'm back from work, how much trouble would Taken get in if he called every other samurai -kun? It seems something his overconfidence + vanity would set him to, but he's also got SOME etiquette and the japanese were rather strict about these kinds of things, so if it's rude enough to be dangerous, he'd just stick to -san.

Ronin are beneath the notice of most clan samurai, (or at least, the clan samurai despise them as honorless dogs) so calling them -kun or -chan would net you many swords in the face.

...Wouldn't getting their asses handed to them by a ronin ALSO piss them off if Ronin are 'beneath the notice' of the samurai? ...Considering I did make Taken pretty bad ass with a sword, with only Raiden, that I can think of off the top of my head, out of the PCs being close to him, and I do plan on placing as well as possible...

Notice i also had my ass handed to me by a grunt house gaurd. pissing people off equals a lost limb a lot of the time.

Spellcasting can only be improved by rank, sorry. You can also try to improve the ring that effects the majority of your spells (in your case fire.)

How do I increase a ring? Just do the ring attributes (Like I think Fire was agility and intelligence, so Yoshi would read and run)?

Well, still busy with work, so my 5 days will have to wait...