"More pain for you means more fun for me!"
Larxene (ラクシーヌ Rakushīnu), also known as the "Savage Nymph" (非情の妖姫 Hijō no Yōki, lit. "Callous Vixen"), was first introduced in Kingdom Hearts: Chain of Memories where she conspired with Marluxia to overthrow Organization XIII. Larxene wields a set of knives called Foudre (エクレール Ekurēru?, lit. "Éclair"), the French word for lightning, and uses the power of thunder to fight.[7] The character was first voiced by Rieko Katayama in Chain of Memories.Yuko Miyamura took over the role for the Japanese releases of Re:Chain of Memories and 358/2 Days, while Shanelle Workman provided her voice in the two titles' English releases.
Larxene makes a minor appearance in 358/2 Days, reluctantly training Roxas before she leaves for Castle Oblivion. When Larxene first meets Sora in Chain of Memories, she helps manipulate his memories by causing him to remember Naminé's name.She then fights him and gives him new cards to access more areas of Castle Oblivion. She intimidates Naminé to keep with their plan and later taunts Vexen after the Riku Replica failed his mission. After she discovers Axel's betrayal and sees that Marluxia's plans have fallen apart, she decides to kill Sora. After Sora finds Naminé, Larxene taunts the two before she attempts to kill them. However, Donald and Goofy arrive to assist Sora. Together, the three defeat Larxene, and she fades into darkness.
Personality
"The heart is a mysterious thing, Axel."
— Larxene, in Kingdom Hearts: Chain of Memories
Although Larxene is normally smiling in-game, she can be undoubtedly cold, ruthless, and uncaring, and appears to love nothing more than to bring other people down. Described the most as a domineering woman of strong personality, who does not ask, but tells, she has sharp wit and sardonic remarks ready to spite others on purpose. Her jokes tend to be more ill-humored as well, enabling anyone to successfully get irritated, and sometimes if pushed far enough, yell or charge at her in anger, a reaction which she seems to find humorous. In the Kingdom Hearts: Chain of Memories manga, Larxene was seen reading a book about the infamous French writer Marquis De Sade, the namesake of sadism, which is clearly related to her sadistic nature.
Along with the callousness, however, she oddly displays childish and playful behavior, laughing and giggling excessively. She, although recognizable with her overall behavior, also appears to have a flirtatious attitude towards Axel compared to others, with reasons for doing so not addressed. Laid back and almost passive to those she likes, or refers to as good company, Larxene expresses herself in a dramatized manner, constantly making outrageous expressions and hand movements. She taunts Vexen incessantly after he is threatened with charges of treason and incompetence from Marluxia, though that could be connected to her personal dislike of the man, and toys with Sora before fighting him the first time. In fact, she even leads Sora to believe that she is a nice person, just trying to help point him in the right direction: "The bad guys have [Naminé] locked away. And you, as the hero, need to go save her!" She then smiles and attacks him, sending him flying with a powerful kick and informs him that she is a "bad guy", mocking his failure to remember Naminé.
After she discovers Axel's unexpected betrayal and sees that Marluxia's and her plans have fallen apart, while affected negatively and almost seemingly disappointed when speaking of it, her friendly manner vanishes and she attacks Sora in a rage. Nevertheless, surprisingly in death, she sounds out a cry of what appears as sadness as she is fading instead of what is expected to be a usual villainous end, especially with her acts throughout the game. It showed a different side of her that had yet to be seen before that compares to Saïx's own demise. This brings to question if she truly is what she has presented herself to be the whole time, or if there is more to her.
In what may be a connection, written in one of the many Kingdom Hearts novels that correlate with the series, she meets Marluxia for the first time and has just joined the Organization as the sole female. The topic of the Organization's goal is spoken of. Being that she was the newest recruit and was asking questions, complaining that there was nothing to do around the castle, and that it was "boring" all the more, Marluxia repeated to her what Xemnas once told him; which was that they were here to regain back their hearts. She had gone silent in thought at the answer, before saying that a heart was not really necessary. She felt having one was painful, and she was fine with the way things are now, perhaps implying that she was hurt emotionally for most of her original self's life, and that lacking a heart keeps the pain at bay.
Nevertheless, Larxene's cruelty was ultimately proven to be her own undoing, as she ultimately pushes Sora too far and suffers his wrath after hurting Naminé.