Excellent show. I don't just see it as ethnicities though, it has a strong commentary on gender struggle that is hidden in there as well. It explicitly makes its main character a non-binary character and callsback to gender issues numerous times. The lead character is also a tanuki not-a-raccoon which by japanese lore Tanukis have giant oversized testicles (I'm not joking).

The show is a great take on a character that starts off not really wanting to change anything in the world. She just wants to get better and leave. She doesn't care. But then by the end of our story we see her mindset progress from

I see this largely as a demonstration of a liberally minded person or politically apathetic individual transitioning leftwards over time. I think this is backed up by episode 4 that directly attacks and critiques woke-liberal behaviour and its tendency to be performative about caring for the struggle of the oppressed while doing nothing to actually change their material conditions and even being directly harmful because they learn nothing at all about the struggle of those who are oppressed, so they still do actions that harm them.

Trigger Studio pretty much hit these kinds of topics and notes in every single one of their shows. I've said numerous times that I believe the internal attitudes of the staff lean heavily leftwards OR the leadership at the company are leftists themselves.