Ecchin
This. Default (size/specials)
gets some ridiculous movement by combining backward hops with C-stick fairs, which can be hard for much of the roster to keep up with if properly utilized, while also throwing out a decent hitbox to reduce your opponent's options. Honestly my favourite out of the Miis, and it's a shame we don't get to see more of them. ROM is a notable Mii Gunner main; here's an example of what he manages to pull off with the character:
https://youtu.be/FcTGFsefrfY
So in my case, as far as my hunt for a secondary goes, I keep gravitating toward characters I either just really like for who they are and/or how they're presented in this game (usually the happier looking characters of the cast), or ones who are highly technical, and I'm coming to the sad conclusion that most of them either share my main's most troublesome weaknesses, or they just don't make up for the weaknesses that sometimes force me to switch quite enough to warrant their use.
DJBor
actually summed up what I should be looking for brilliantly, yet I'm being so excruciatingly picky about the whole thing, it's driving me insane. LOL It's hard to find a character who is (1) preferably among the new challengers in this entry of Smash, (2) doesn't use a sword (everyone and their grandmother around here uses swords, so it makes me feel like being different), (3) can deal well with
and
in particular due to their crazy disjoints, (4) has enough technical intricacies to keep me from feeling like I'm playing something incredibly basic, (5) isn't someone my closest companions already play since that has a tendency of making the general vibe in the room pretty gloomy, and (6) isn't too obnoxious for some of the players I play with more regularly who are generally of a lower level than me (not saying I'm amazing, just based on the evidence). Honestly, there's probably even more criteria holding me back than this, and some of it, I know, should be ignored and I need to just get over it, but man it's hard...
I'll see about posting a list of the characters I tend to cycle through at some point as I sort things out more... Also, I think the only character I wouldn't consider aside from ones my usual crew already main/secondary/pocket is
; literally the only character I can't seem to like for anything.