So I know there have been theories of Trixie being important in some way, and the more I think about it the more it seems plausible (if not this season, the next one). It’s rather interesting to see how she interacts with people - she becomes Maze’s first friend when Maze is alone, constantly affirms to Lucifer that she adores him, lets Amenadiel know in their first interaction that he’s good. And, it makes sense that it’s not Chloe who’s special as the miracle, but that Trixie is, since she’s the child of both a miracle baby and a man who could somehow resist the pull of the blade.
And what stood out to me on a rewatch of that scene with Amenadiel - one of the first few things she says to Amenadiel is that she likes his necklace. She’s the first one who ever brings attention to it (to the best of my memory), and lot and behold, his necklace is the final piece. It’s pretty cool to me that she immediately notices the piece; I’m interested in what other people’s thoughts on it are - if she has powers (or some intuition, or is important in some way), if it was just clever foreshadowing on the writers’ part, if she’s just a normal kid, etc.