Jeanne is a young, blonde woman. She wears a goldenrod yellow evening gown with a gemstone studded masquerade ball mask, showcasing her lower face with matching yellow lipstick. Her mask was yellow as well, and Taylor recognized the gems studding it as her namesake gemstone - citrines.
Multiple characters have noted that she is physically attractive, including Accord and Skitter. She dedicated an hour every morning to caring for her skin, another hour to her hair, which was "immaculately styled".
When deployed to New Delhi she is explicitly referenced as having thrown off her elaborate gown costume for a more practical bodysuit. Implicitly for ease of movement.
Accord referred to her as his "best Ambassador".Taylor suspected that she had a similar personality to Grue - they were both "professionals". Citrine led the Ambassadors in battle, even when her power was ineffectual.
She assessed the Undersiders as a threat based on their track record, disagreeing - politely - with Othello.
Taylor believed that she wasn't Grue's "type". Nevertheless, it bothered her that she didn't feel jealous of the time he spent with her. It was implied in his interlude that she was attracted to Accord.
Citrine's power allows her to "attune areas to particular functions", altering specific properties within a relatively small area.
She can interfere with gravity, temperature variation, friction, light intensity, and the progression of time, among others. She claimed that there were "more possibilities than I could count, many so minor you wouldn't notice." She could use her power to make everything within her ability's range effectively waterproof as an example.
Most notably, Citrine can "find the right attunement, as though I were searching a radio station" to neutralize a given parahuman's abilities. Furthermore, she can specifically cancel out protective powers, or cause powers to go out of control. This latter effect never takes more than twenty or thirty seconds. She risked striking the wrong attunement and accidentally killing her target. Further some powers are too subtle to find out in time before she is retaliated against, or have the subject step out of her range.
Citrine's power gives everything in it's area of effect a washed out yellow effect, as if the observer was colorblind, only able to see yellow. Under the influence of the Yàngbǎn it appeared as a golden glow.
Despite being from privileged family she had grown up violent and 'uncivilized'. During her last year in juvenile detention center, before transfer to adult’s prison, she received an offer that she could not afford to refuse.
When talking about the type of people who sought out Accord, she implied she was the type that had power and sought more.
She accompanied Accord to a neutral meeting of all the villains in Brockton Bay. Afterwards she agreed with Othello's assessment that the Ambassadors could deal with any individual group but not more.
Accord sent her to inform the Undersiders leadership that the Ambassadors would be "recruiting" five new parahumans - by which she meant purchasing five vials from Cauldron for Accord's five highest unpowered lieutenants. She admitted that she was also a Cauldron cape.
During the battle with Behemoth, she helped suppress his sonic attack. This extended to several other effects the dynokinetic monster used against the defending forces. She was not able to counter all of the Endbringer's attacks however and eventually had to withdraw from the battle, due to exhaustion.
It was initially planned for Citrine to meet with The Number Man after Accord's death and, recognizing that she had been in love with Accord, form a relationship with the former Harbinger instead as a way to move past her grief.
↑He stopped partway up the stair case and faced her, saw her unharmed and unhurt. His Citrine, young, blond, wearing a goldenrod yellow evening gown and a gemstone studded mask. Her hair was immaculately styled, her makeup flawless, with a yellow lipstick that matched her outfit without being garish. - Excerpt from Interlude 20.y
↑ 7.07.1The area of effect is smallish, so it creates a problem where the power is very subtle up unless she can actually target someone who won't just walk out of range of it, or if she can keep a fight going long enough to figure out a power's frequency. - Comment by WildBow on Reddit
↑ 8.08.1Citrine Altered reality in a small area, adjusting physics or natural laws. Could attune 'frequency' to diminish or disrupt a parahuman's powers, with perfect frequency killing them. Ambassadors - Parahuman List, bolded edit by Wildbow.
↑ 9.09.1I could sense the Ambassadors. Citrine and Othello were there. So were four new recruits: Jacklight, Ligeia, Lizardtail and Codex. The fifth potential recruit hadn’t been so lucky. The four of them stood off to one side, in the shelter of Citrine’s power, listening as she gave instructions. The area around them was somehow faded in terms of the colors there, the area she was affecting looked as though I were viewing it through colorblind eyes that were capable of only seeing yellow. Water wicked off of them as though they were waterproof, leaving them utterly dry even in the wind and rain. - Excerpt from Imago 21.6
↑“Because, Jean Brown, I understand the desire to rise up and desperately make sense of a world that seems so senseless. I read every file that can be found about you, and I don’t believe you ever had a chance to be civilized. [...] I know who your stepfather is, I know who your teachers have been. Your judge remarked on your privileged background, but you were the last file he looked at after an overworked day. He hadn’t had a vacation in five years and his retirement was imminent. He was lazy and he didn’t see you.” [...] “This will be far more difficult than juvenile prison, and even more difficult than being a newly minted eighteen years old in an adult’s prison, Jean Brown. You will want to do as I instruct, regardless of this difficulty.”
She wanted to ask why, and her instincts told her that she couldn’t and shouldn’t.
↑“Why?” I asked. “Why leave a successful, ordinary, happy life behind, and go to that risk? Why work for Accord, of all people?”
“Power,” Citrine said. She turned her back to the portal to meet my eyes, her dress flaring slightly with the rotation of her body.
“Power isn’t magical,” I said. “It creates as many problems as it solves.”
“Power is less a thing unto itself than it is a journey.”
Her eyes were penetrating as she gazed at me. “Not all journeys have destinations. Power is the ability to effect change, and people who create change ride that tide, with far-reaching effects. For some of us, that’s something we’re born into. Our fathers or mothers instill us with a hunger for it from a very early point in time. We’re raised on it, always striving to be the top, in academics, in sports, in our careers. Then we either run into a dead-end, or we face diminishing returns.”
“Less and less results for the same amount of effort,” Grue said.
“Others of us are born with nothing. It is hard to get something when you don’t have anything. You can’t make money until you have money. The same applies to contacts, to success, to status. It’s a chasm, and where you start is often very close to where you finish. The vast majority never even move from where they began. Of the few that do make it, many are so exhausted by the time they meet some success that they stop there. And others, a very small few, they make that drive for success, that need to climb becomes a part of themselves. They keep climbing, and when someone like Accord recognizes them and offers them another road to climb, they accept without reservation.”
“Which are you?” Grue asked. “Did you start with power, or did you fight for it?”
Citrine smiled a little, looking over her shoulder at the tower. “I suspect Tattletale will tell you, if you’re curious enough to ask.” - Excerpt from Imago 21.4
Wildbow: Accord was definitely grooming Citrine. Sorta wish I'd explored that more Wildbow: But in writing Worm, I was definitely keeping the "That thing you're planning to do in the future? Do it now. Move the story forward" adage in mind, and it had done well for me up to then Wildbow: But it did sorta overly condense things in the final quarter Wildbow: The Citrine/Imp vs. Heartbreaker interlude I ended up canceling would've touched far more on that Wildbow: But I wasn't comfortable with writing romance/relationship stuff. Wildbow: Would've done a lot to round out the Number Man, tho Wildbow: Citrine mourning the death of Accord, meets with Number Man to discuss taking over the Ambassadors. Wildbow: He fills some of the void that Accord left. [...] Ridandria: She wasn't sure she was in love till he threatened her with a plastic protractor Wildbow: No, Rid is closer. Up til the plastic protractor bit. Wildbow: There's a reason I canceled it though. Wasn't sure I could sell it. - Wildbow on IRC