Cuilang's clothes are definitely not Ainu. I'm fairly sure he's meant to be Mongolian.
Changing tags appropriately.
The one with Ainu's clothes is Pilika. Cuiliang was supposed to be based on Budhist clothing mixed with Tibetan/Mongolian colors.
Her clothing color was a joke taken too far: the color "ao" in japanese can be translated as both "blue" and "green", so they swapped the blue color normally found in Ainu design into that bud green.
The one with Ainu's clothes is Pilika. Cuiliang was supposed to be based on Budhist clothing mixed with Tibetan/Mongolian colors.
Her clothing color was a joke taken too far: the color "ao" in japanese can be translated as both "blue" and "green", so they swapped the blue color normally found in Ainu design into that bud green.
Is there a developer interview saying as much? Blue is by far the most common colour for Ainu clothing, but robes dyed other colours exist, at least. And even if they didn't, it'd be fairly minor matter of artistic license. I'd have assumed that they just wanted Pilika to have a green palette, not that it's wordplay.
Likewise, Cuilang's outfit doesn't particularly look like monk clothing, it just seems like stylised Mongolian dress to me. Especially the toortsog! And while I haven't played Azuma yet (money, you know?), I'm told he's pointed out as coming from a nomad culture. But again, that's me looking in from outside - if there's an interview or similar explaining in more detail, I'd appreciate a link!