There's a Japan-exclusive anime called Bomberman Jetters that was subbed on YouTube which I either found or was referred to by my cousin Dinner Sonic. I had watched up to the 20somethingth episode out of 52 quite some years ago and had stopped. Some years later I decided to go back to it from where I left off and in a matter of a couple days, finally saw it through to the end. After I finished it, I became
absolutely obsessed with the series. Like, it was all I thought about for like 2 years or so, I even started making OC's (Mithy and Mossy, for those who remember the love topics) and a sprite comic based off it (which no one but my cousin has seen). Even before I finished it though, I had already decided who my favorite fictional character of all time was: one of the main characters, and White Bomber's (AKA Bomberman to those who're unfamiliar with the Jetters series) older brother,
Mighty. I noticed a couple other YouTube channels (such as the one who uploaded the Jetters episodes) using names like "ZeroJetters" and "mistyjetters" so I think that might have had influence on my decision, as well. So, conclusion: Mighty + Bomberman Jetters = Mighty Jetters. And it ended up being a unique username on every website so far (with the exception of "Axle the Red" that I started using on some sites a year or so ago), so, yay.