Wigfrid’s symbol?

I played as Wigfrid for the first time and I noticed this symbol below her sanity. It consisted of a treble clef/ G clef and her battle helmet on top. I tried figure this out by myself, but even after googling I couldn’t find anything helpful. Someone who knows what this stands for/the purpose of this?

I played as Wigfrid for the first time and I noticed this symbol below her sanity. It consisted of a treble clef/ G clef and her battle helmet on top. I tried figure this out by myself, but even after googling I couldn’t find anything helpful. Someone who knows what this stands for/the purpose of this?