"I've read the files of order sixty six, the genocide of the Jedi. But do you know who revealed the plot and died trying to spread the word? A Clone. His name was Fives. I exist, and have my uncles, aunt, and my dad, because of him. I'm here because of him. I'm fighting for him as much as it's to keep my father out of trouble. Besides, it's the right thing to do and I was trained to do this. Under the radar. So Dad and Wolffe wouldn't find out. You know what they're like."
The son between Captain Rex and Peonia Ylandra, Domino is as unlucky with trouble finding him as the two survivors of Rishi Moon were. Named after both Fives and Echo, he carries the death of the first in the Imperial Age heavily and he seeks to be as focused as the latter, who he spent a lot of his childhood around. Echo's parental tendencies, mostly of the maternal variety, ended up being adopted by him and he often 'mothered' Wolffe and Gregor on Seelos.
The Age Growth mutation has passed onto him but at a much slower rate than Clones, and though he's only hours older than the Empire (a fact he's proud of), he acts more like a twenty-year-old and reminds Rex of his cadet days far too much.
The fate of his mother is unknown, though she is believed dead, and wherever Rex goes, he follows. It sometimes leads to arguments, more so when it's a dangerous mission, and whenever one i injured, the other becomes twice as fierce. The spiders learn that Domino can rip their legs with enough pressure: an accidental discovery on his part.
His armour is Rex's phase 1 plastoid, with some of the phase 2 pieces he no longer wears, that were kept in a safe. As homage to his favourite Uncles, Wolffe heped him draw the 104th pattern, Gregor gave him a bicep piece from his gear, and his vambrace is his Uncle Ace's, whose death hit Domino the hardest of all.
A lot ofhis life is spent around the Clones of Amarantine (which have been created in secret since before order sixty six, chipless, and eventually from Ace's ALPHA Arc DNA as the codes to the least altered of Jango's they could get. They make up the Dawn Cell of the Rebellion, led by Jedi General. and his Aunt, Aurora Ylandra and the 210th Assault Legion, who all had their chips removed once she made her investigation into the matter public to them. Here, The Clone Wars never ended, and a lot of the equipment are the same: ARC Fighters, V Wings, Y Wings, and even Jedi Starfighters that had been salvaged alongside her fleet of Venators. He learnt to fly arc fighters and how to man turrets.
However, it eventually became too dangerous for regular visits to his rebel family and he remained on Seelos.
The scar on his face came from the Empire's attack on Seelos, and it earned him a concussion and a vague memory of the event.
Sometimes he gets shot and everyone looks so concerned at him, and he goes 'Two of my uncles survived getting blown up. One of them sort of survived it twice, though one was a crash and he doesn't really remember anything about it. I'm fine.' Everyone is Concerned. Somehow Mother's Rex sometimes, but ultimately still falls asleep on his lap like he's ten :')