Slipping another canon kid in with this batch:
Numa Bril Nerrad (nerra/brother and ad/child, because I'm a sappy goof), who was one of the very first war orphans adopted by clones - and consequently one of the first to grow up and become a soldier herself. A skilled scout in both wild and civilized terrain, Numa's speed and quick thinking are her greatest assets, both honed by years of babysitting younger cousins. There's a great deal of proud belief that she's on the fast track for Command position.
Nittu Windsong was a slave as a young child, freed during the Tatooine Liberation along with his close friend Atru Suncaller. Whereas Atru took a liking to Rex, though, Nittu became close to Cody, and now he proudly wears the 212th yellow along with his Unfettered symbol, twin suns, and the claws of Leia Ikkelta, the Mighty Dragon. And just as his cousin Numa wrote the names of "Boil" and "Waxer" on her bicep guards in aurubesh script, Nittu wrote "Cody" on his own. The yellow crescent tattoo around his eye is also meant as another connection to his adoptive dad.
Kashi Ijaat (Mando'a for honor) is a tholothian orphan from a backwater moon who had the fortunate luck of trying to pick Poo Koon's pocket. Boost and Sinker were tasked with getting the skinny kid a decent meal, took a liking to him, and, well, next thing you know the Wolfpack gained a new mini member. He specializes as a sniper, has a surprisingly strong sense of humor, and always keeps a few credits or spare ration bars on hand for handing out to those less lucky than himself. The words Pack and Ijaat are written on his breastplate in mando'a script.
Plee Koon was originally a stowaway. She lived in the ventilation system of the 104th's flagship for several weeks before someone realized, and even then it was shock for them to stumble across a small, feral child with wings rather than typical space vermin. Wolffe somehow managed to be the one to catch the kid, who would inexplicably go still when she saw the difference between his natural and cybernetic eyes - similar to the contrast between her functioning left eye and scarred, partially blind right one. Her language skills at that point were nonexistant, her genetics a mix of human with something unknown, her attitude outright hostile to anyone other than Wolffe or the ever-patient Plo - so of course they decided to keep her. The wings present a challenge to armor, but Plee's airborne sniping and divebombing are invaluable in fights over difficult terrain. As a teenager she bears a dry wit and fierce loyalty to her family... and for some Force-forsaken reason a crush on Jinni Skywalker, which amuses her grandpa Plo and makes poor Wolffe want to bash his head against a wall.