We started part 5 with a new party member, Tataro aka "grandpa". We made a couple of really important discoveries in this episode. I will spoiler-tag them because they spoil the plot a little and spoil the contents of the video.

We discovered:

• This game "teases" content. Grandpa is our first magic user and has a large list of (what I can only assume) late-game spells. We make it to the next plot point, literally only a minute later he leaves our party. We barely had a chance to even figure out what his magic spells did.
  This concept of showing the player a high-level playable character early on in a JRPG has been done before but this game might be the first to do it. I can think of Final Fantasy 4, (FF2 in USA) where you unlock Tellah's hidden magic as the closest example, but that game came out more than a full year later in July 1991.
• Grandpa has a spell that changes the seasons. If there's a spell that changes the season, the implication is that the weather has some sort of gameplay effect. Perhaps the season determines what kind of monsters will spawn in encounters. At any rate, I can't really think of another game that does something like this.

Really exciting stuff. The game is actually pretty funny in its own way.