It's clear that Michio is not the first "traveler" to come to this new world as somebody managed to set up a functioning flush-able toilet in a house Michio was looking to rent, and at least understood modern plumbing even if not able to implement it. Said person was also clearly more paranoid than Michio as this house is also entirely coated with anti-teleport materials.
Vesta becomes one of the more powerful melee attackers in the party at quite a rapid pace. Racial abilities aside, the way Michio raised her levels is actually the best way for most characters. Take in a low level character, switch them into a superior job quickly and watch their stats skyrocket with an experience gain buff.
In the prologue, Michio spends hours trying to maximise the number of bonus points he rolls in the character creation interface. This has proven to be one of the best moves he's ever made, due to the near cheat level skills he can access with those points.
In the prologue/chapter 1, as Michio is going through the "character creation" interface, there's not only four worlds for him to choose from, just from the preferred parameters, but he went through quite a few "characters" as he was trying to acquire 99 bonus points. We now know that those "characters" were real people. What happened to them? And more importantly, all those other worlds that Michio ignored... We can only hope that they're getting their own "hero" because their straits are likely as bad if not worse than the one Michio chose, especially since Michio chose one that has the highest likelihood of "friendliness." Even on the world he did choose, there are other countries having the labyrinth problem that he pointedly ignored...
While speaking with Allen about purchasing Roxanne, Allen specifically tells Michio that a slave contract is null and void if a master abuses the slave "too much." Considering that the norm is treating slaves as livestock (ie cannon fodder in labyrinths, eating cold leftovers, sleeping on the floor, expected to do hard labor without decent tools or even shoes), one has to wonder what "too much" abuse looks like, especially as it is spelled out that the master is responsible for food, shelter, and tax payments on a slave's behalf... Small wonder Roxanne and the others call Michio "kind" for treating them like people.
