The bridge character is essential to the narrative, it's just not HER narrative.
And later, as if because the readers have asked for more, as if something about her caught their imagination, prompting fresh fan questions, she features again and the panels frame more detail, more of her back story, her motivation and perhaps we learn her true name.
In a few years time it may be that a reader develops into a writer, or perhaps an editor, and a story is commissioned telling HER history with colour, with space and we see, at last, her scars and at last we see the essential essence of how she came to be. And we identify with HER.
But one night when we look back when we read again that first appearance, we realise that there remains some unexplained detail, a few missing pieces of her jigsaw
and as we put the final touches to our too tight cosplay, we wait, with hope for her OWN title that just might reveal her full narrative.