Somewhat intentionally and somewhat unintentionally, a lot of Mina's story explores what it's like to have grown up very much at the bottom rung of society, and suddenly be at the top - and how much they're willing to give up to remain in that position.
A lot of the ways this manifests are things that happen in the real world. The way that English has rapidly taken over their life since coming to London, to the point that if they had kids, they might not speak their native language with them at all. They dress exclusively in Western fashion. I was asked recently if they eat kosher and they do - but only at home. It would be too inconvenient for intermingling with high society otherwise.
There's all that, and more, but it also dips into flondon specific things. How they've lost so many memories to irrigo first as a bad coping mechanism, and now as a part of doing their job - yknow, the job that is their way of maintaining power. They once forgot how to pronounce a sound from their native language, and had to relearn it. They quite literally sold their soul in exchange for social advantages with Hell and more influence in the Great Game.
From the beginning, it's always been about what all they're willing to give up in pursuit of their goals. Their language, their culture, their soul, their memories. Even memories of the very love they came to the Neath to avenge.