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>>715355115
They are Primaris Muhreens, they were taken all over the Imperium and turned into generic Ultrasmurfs
Straban is an Imperial Fist/Iron Warrior, Vepasius is a Word Bearer, Scipius is a Raven Guard, Decimus came from the Celestial Lions aka the Wakanda of 40k
Even Captain Acheran is an outlier, there's a specific Dark Angels successor Scotland chapter who specialize in 2H swords
Gadriel is from the White Scars and though Chairon claims he's from Calth, he's more Salamander than Ultramarine
Unless they retconned the lore, geneseed implantation will only accept similar race dudes and reject blacks/browns since the geneseed not only gives gene coded loyalty and obedience that is hard to break, but also the Space Marine will start to take on physical characteristics of their Primarch
That's why all Blood Angels look like Adonises, all Ultramarines are white patricians, Space Wolves are all gruffy wolf vikingwolves woof woof, all Salamanders are blackest blacks, etc.