(CARLA! I'm sorry I didn't start Cal/Isaac like I said - I have a doc open but I got distracted with stuff like this. XD)
Okay, so... I hit the character limit before Jo, though Jo is working on character #8. I only kind of feel bad? I meant to have another student, or a girl, or a POC, but this has been nagging at me to revive and the best direction/plot I could come up with.
Let's begin! This has yet to go on the timeline, but feel free to put this into your memory banks, because almost every character will know about this. Back in 2005, Reed Richards and Sue Storm had something of an accident baby, considering Franklin and Valeria were both adults by then. Gale was the youngest of this particular superbabies generation, some of your characters probably babysat him, he was passed around through the village and cared for by everyone who's close with the F4 or on Team Science(!).
So get this: in 2010, days short of Gale's fifth birthday, he disappears from his bed. He vanishes without a trace. This is a massive event in the timeline of the game, and it's a huge public shock and it completely wracks the community. Maybe your character was suspected of doing something or questioned by the authorities. Maybe X-Factor was hired to get on the case and it's their greatest unsolved mystery(!!!!).
It's 2014, and the case remains unsolved.
What your characters don't know is that Gale's been alive the whole time! The thing is, his powers are out of whack. He's a chronokinetic of perhaps unlimited potential (in the way that his big brother is "beyond omega levels" of power, lols), but none of his powers actually work. The way things are now, Gale's powers involve involuntary time travel. Without any warning, without any plan, Gale disappears out of the normal flow of time and pops backward and forward, usually staying between 1500-2100 AD. Sometimes he's there for hours. Sometimes he's there for years. If you really do your research you'll find traces of him in the past.
So! Gale's been bouncing around, sometimes in the future and sometimes in the past, and now he's back. He's not nine, like he should be, but instead he's somewhere in his late twenties and gorgeous. Having had to survive and/or rely on the kindness of strangers since age five, Gale's a bit of a time pirate -- a scrappy and charming urchin who doesn't care if he lies, cheats, steals, or sleeps his way to survival. He's kind, but he's selfish, and it's hard to tell whether you should trust him or not.
As of right now, he'll probably have some vague memories of some of you, but the last time he saw any of you he wasn't even five years old -- with the exception of the people in the game who are immortal or otherwise blessed with longevity. He's spent some time in the future and spent some of his formative years with the ... godlike cyborg Luka Romanov, and right now Luka's his lifeline until he gets to know more people. So if you've got a character who might exist in the future (say... 2100-ish), let's drum up some headcanon!
He might end up working at the school, he might find a job somewhere, he might end up a professional grifter, I don't know yet - I just know he's going to show up somewhere and try to find Luka to make his way back home. This is his first time crossing into his own proper lifetime, so that means finally solving the "What happened to Gale Richards" story and meeting his parents again.
I should also mention that Gale is open for siblings -- Franklin and Valeria are open for play (though Franklin needs some limitations, idk), as well as any additional siblings who want to see their "baby" brother suddenly be older than them.
tl;dr - Gale disappeared in 2010. He's back, he grew up and got hot, because he's an involuntary time traveler and he's now a little Artful Dodger and a little Jack Harkness if they had the sucky powers of the guy in The Time Traveler's Wife. HAVE AT HIM.