Byleth was chosen to be in Smash Ultimate before Three Houses released, so Byleth being placed in Smash because they were the “popular” pick doesn’t really fit that timeline.
I would say a side character in Three Houses would be constituted by, like, either a House member that isn’t one of the main “lords” or, like, the Garreg Mach guard.
In Three Houses, each of the paths you take largely revolves around the actions of 1 of the choices. One of them plays a major role in all routes, as they essentially set the plot in motion.
One cannot be a side character, and play a pivotal role in the story. Those are two completely different things.
Saying Dimitri, Edelgard (best), and Claude are “side characters” is akin to saying Hermoine, Draco Malfoy, and Ron Weasley aren’t main characters in Harry Potter. Obviously the plot revolves around Harry, but his two best friends and his rivals are important characters to the plot and narrative.
Hope I’m not coming across as rude, however I do feel there’s a misunderstanding. Popularity does not necessarily denote plot importance. Kass is a majorly popular character to come out of Breath of the Wild, however, he is not overall as important as other characters.
Just because Kass, for example, is not playable in Smash does not mean that Kass is unpopular, or something of the sort.
Hell, Smash will undoubtedly end with a handful, if not several handfuls, of popular characters missing out. That doesn’t mean that those characters aren’t popular in their own ways.
Anyway, carry on. Just happened to see this happening and I was like, “Woah” and then “Oof” and then I just kinda wrote a Jonespost..:sorry about that.