From this article on Fandom.com:
“He’s the Lord of Eregion — and being a lord is something akin to royalty — which is very close to Khazad-dûm,” says Charles Edwards as he begins to explain Celebrimbor’s place in the story. Khazad-dûm is otherwise known as Moria and is the ancient underground kingdom of the Dwarves of Durin’s Folk that existed beneath the Misty Mountains. “He’s actively trying to turn Eregion into a place of excellence. And he is working with the Dwarves towards that end to try and capitalize on their talents and their creativity.”
Tolkien has said that in the Second Age, there had never been a time when the Dwarves and Elves worked so closely together and got on so well.
“In our story, Celebrimbor encourages and assists Elrond to visit Khazad-dûm and to court the Dwarves,” adds Edwards. “He may have an ulterior motive for that, but Celebrimbor is very much in support of working together … neither race would have produced the wonders that they had, that they created, without the aid of the other. So clearly, we’re in a time of peace, certainly in terms of working relationship, and [Celebrimbor] has a great respect for them. And Dwarves have a reputation as being fanatical workers, and jewellers and crafters, and Celebrimbor very much respects that.”
“He’s cautious, he can be quite gullible,” says Edwards. “He’s vain. He’s a brilliant craftsman. And he’s very meticulous. He can be a bit of a user. But he can also be used. He’s proud. He prefers seclusion; he’s not a people person. He is not terribly socially interested. He can be quite blunt. He’s very ambitious. Colossally ambitious.”
“He’s reached a point, in our story, in his existence where he is starting to doubt himself,” explains Edwards. “And I think what drives him is a manic obsessive desire to create. Above and beyond what he has already created, he wants to surpass all that has gone before. And because he’s reached this juncture, he starts to doubt himself and his validity. He lives in a very long shadow of an ancestor, shall we say, whose achievements were considerable. And he has always wanted to try and eclipse [that]. Some would say he’s already done that, but he doesn’t believe that he has.”
“He’s searching; he wants something which is as yet unknowable,” Edwards continues. “We find him in quite a confused place. But this rocks his belief in himself and makes him vulnerable, and vulnerable to predators. He’s become very single-minded about wanting to conquer, creatively, and to come up with something that’s going to be the be-all and end-all.”
“He’s in pursuit of something bigger that no one else understands. And therefore he can be single-minded. He can use people, but just to get somewhere he thinks is going to be for the betterment of everybody and bring him great glory. He’s very vain.”
“[He invented the name ‘mithril’ for the precious metal that the Dwarves mine and] that’s very cool, isn’t it? There’s no doubt about it. He’s a very cool guy. He invents a lot of stuff. And when you see inside his workshop, you will marvel just as much as I did when I saw it for the first time.”
Also: two new pictures.