Being 10 There's not a whole lot of brackground to go into but...
Brave explorers, intrepid adventurers, grizzled battle hardened veterens willing to pick up a blaster and head into the unknown dangers of the vast with nothing more than their wits and a blaster at their side. These are what you think of when you think of a Starfinder.
It is not how anyone would describe justin.
Small, timid, and with more than a little fluff under his fluff Justin was content to learn about the universe from those who had seen it from the safety of his favorite papasan chair: after it had been veted by a respected publishing company and thoroughly peer reviewed of course. He'd even seen some incidents he knew his parents had been involved in, and was pretty sure he'd be seeing his sister mentioned by name eventually.
Both of his parents and his sister had gone off on some enormous expedition. His little sister was already at a school on Sol, but he'd been dumped off with "Auntie Fitch" on the Master of Stars and was content to be yet another ysoki mechanic crawling into tight spaces and replacing control modules. And then he got the call. He told Thoth to put it on hold until he could finish welding a few fuse plates into place. Other mechanics just bolted them on, but the specs called for them to be welded in so welded in they were. Once done he wriggled out and just barely missed picking up at the end of the message.
"Play it Thoth"
A jet black rat, enormous by ratfolk standards, waved at the camera. "Hey baby bro, I'm just out here exploring the galaxy." she dropped to a faux whisper "Hope you're not too busy with nap time to listen to this message that I've gone through a LOT of trouble to send you. Wave hello to mom and dad, we're on the same squad for this one!" the camera tilted to a pair of patchwork rats, waving over their shoulders from the helm. "Keep your" the message cut out in a weird golden light. The Ysoki tapped the pin sized computer on my tail a few times. "Your holoemiters on the fritz again?"
"No. The problem is with the signal itself. Although if you want to take another whack at properly seating the emitters I'm not going to object.
Weeks passed before the enormity of the situation set in. 80% of the starfinders lost.