Assuming you mean the Broideress – 

Míriel didn’t want to be Queen and did not really sit down and think of what marrying the King of the Noldor would entail on her time and plans and pursuits (and if she did, like my favorite or maybe second favorite AU, she would have turned down Finwë’s proposal). She loves the adulation of people, the praise, but because she likes the recognition of her passion and work. She devotes herself to perfection and greatness in her chosen craft and let no one suggest the Noldor aren’t competitive and her in particular – though her greatest rival is herself. She doesn’t want to loose valuable precious time that could be spent doing what she loves on that which she hates or finding boring if necessary. Very set ideas of what is good taste and good art and what isn’t. If Nerdanel and her actually interacted instead of this vague connection via the same loved ones and circle of similar but not same interests, they would have disliked each other. Míriel finds Nerdanel’s more abstract and experimental pieces a waste of talent. And Míriel doesn’t hide her scorn of lesser pursuits and talents and the sheer boredem she has in dealing with courtiers or Noldor whose creative and scholarly pursuits aren’t to her interests or tastes, though she doesn’t go how of her way to be obvious about it. Clearly go into very lengthy (and quickly worded and enunciated) speeches about her opinions, because she is also canonically very proud of her voice and how quick and clear and long she can talk. And this very quickly begins to annoy certain people among the Noldor (nothing like being told you don’t speak right and stop inventing new words and sounds and if was good enough for me it’s good enough for you) and because it’s also canon that Míriel refuses to go back on something if she’s said it because she’s to proud to change her mind or seem anything but self-doubtful or inconsistent or not right – Míriel baiting becomes a hobby for the town wits. oh, they feel horribly ashamed of it, all contrite, but ever so easy to target with words, stubborn and contrary. Her grandsons inherit the same flaw, so watching them twist around statements of ‘of course I knew that’s what that word meant, i was just testing you’. The problem of the giant and yet fragile ego.

Also, Míriel with silver hair is awful and I soundly reject it. Silver hair nets and silver clothing if we must have the ham-fisted symbolism, but silver hair is a trait of Thingol’s kin/the Sindar and that’s a fucking hell no on blood relations.

Oh, and while in the Halls of Vairë and Mandos, turns out her and Daeron are soulmates. 😉