I don't understand the feelings of the weak. The law of the world is survival of the fittest. It's how the weak are weeded out. It just means those people that died were too weak. It's only natural for the weak to perish.

Esdeath the Ice Fairy was the Empire's leading General and main leading antagonist of Akame ga Kill. Not only she is notorious for her actions such as grooming Tatsumi, but having a large breast size in the anime. She wielded the teigu Demon's Extract, which gave her ice powers. She was also the leader of the Jaegers, a group aimed to counter the Revoltuionary Army's Night Raid.

Esdeath was born in the Northern Frontier Lands and is the sole remaining survivor of her village, the Partas Clan. She spent most of her childhood in the north with her tribe and she was very close with her father, the clan chief due to the death of her mother at the hand of a super-class Danger Beast. She was a skilled and formidable fighter, even at such a young age. Whenever she caught prey for the tribe, her father would begin gutting the creature without killing it. Due to this, she became comfortable with the idea of inflicting pain on living things. However, her father was worried that this might cause her to lose something that she can't regain, but for her to survive, this was fine with him. Her father told her that in the North, "the strong live and the weak die", a creed she kept close to her heart. One day, she returned from an outing to find her tribe destroyed, with everyone either dead or dying. Her father was mortally wounded and soon passed away in her arms. From that day on, she vowed to herself to become stronger. Later, she joined the Empire's military, rising through the ranks rapidly, and, at some point, the Prime Minister allowed her to choose a Teigu. She noticed one that was chained off from the others, felt that it was calling for her and chose it. Instead of drinking one glass, which would have been enough, she drank the whole thing. After taming the Teigu, Esdeath would gain the title of the strongest in the Empire.

After gaining her Teigu, at some point later, she would become aware of General Liver's incarceration and free him. Later, she would be ordered by the Empire to go with Boss and "make an example" of the Ban Tribe that had risen in rebellion against the Empire. Using her mastery over ice, she froze an entire river that cut her army off from the tribes' main village and used this makeshift ice bridge to cross over and defeat them, capturing their leaders. She then ordered her army to "violate this town until [they were] satisfied," resulting in the mass murders of civilians as well as the burning of the village to the ground. She forced the leaders to watch their village "violated" to encourage future insubordination to the Empire. Sometime after this, she is told to go subjugate the Northern Tribes. Her forces defeated them faster than anyone expected. During this conquest, she buried 400,000 of its people alive, and broke the hero Numa Seika's sanity and pride, forcing him to strip naked and lick her boots before killing him. Following her return to the Capital, Esdeath has stated that she wishes to try her hand at falling in love. She provides a list of short but incredibly specific qualifications to the Emperor and the Prime Minister.

At the Führer's request, she sent the Three Beasts to kill his political enemies. After those three were killed off, she formed a new group called the Jaegars, this included Wave, Akame's sister Kurome, and Sheele's infamous killer Seryu Ubiquitous. She them holds a tournament of the prize of Sheele's teigu Extase, which was won was Tatsumi. It was there when she fell in love with him, she takes him to the Jaeger's HQ. Tatsumi tried to have her defect from the Empire, but that failed.

Seeing an advantage in her affections, Tatsumi tries unsuccessfully to defect Esdeath to Night Raid. His attempts to convince her to leave the empire fall upon deaf ears and Esdeath sternly retorts that it is she who will change and control him and not vice versa. After a few days with the Jaegers, Tatsumi manages to narrowly escape from Esdeath, and a hostile Wave, who spotted Incursio and recognized it as a Teigu belonging to Bulat and attacked. Tatsumi's departure only serves to increase Esdeath's longing.

After she lost him, Esdeath begins to feel depressed and noted the change in herself while she was on night patrol (while riding her dragon) and how she went out because of how pretty the moon was. Something that was very out of character for her. When she noted a person on Mount Fake, she jumped down to fight him, only to find that it is Tatsumi, much to her delight (and his horror).

After Esdeath is done reminiscing and wondering where Tatsumi had gone, she received word that Night Raid was spotted on the outskirts of the Empire. Along with the Jaegers, she headed toward them in expectations of Najenda and her tricks. The entire ordeal ended up being part of a rouse by Night Raid as their plan went astray, and even went as far as to lose a member of the Jaegers. Unfortunately for Esdeath, she was played skillfully and was used to clean up a large group of Bandits.

Immediately after their battle in the outskirts of the Empire, Esdeath & her Jaegers received their new mission of protecting Bolic, an Empire spy in the ranks of the Path of Peace. The Jaegers were assigned to overlook the well being of Bolic under the assumption that Night Raid would attack. Just as predicted, Night Raid invaded. During the Invasion, Esdeath shows exceptional skill which is well beyond the level of a mere soldier (just as expected of the Empires Strongest). It is during the fight where she reveals her Demon Extract's Trump card "Mahapadma" which can freeze time and space itself. After Bolick was successfully eliminated, Najenda activated Susanoo's ultimate ability

After Tatsumi was captured she tried to execute him, his allies rescue him. However, it begins to divert in an engagement that involves the death of Great General Budo and Mine's fate. However, she inevitably dueled with Akame until she died.

In the anime ending, she takes her own life after being lethally injured by Akame. She finds Tatsumi's corpse and hugs him until she froze herself to death.

In the manga ending, Tatsumi becomes a dragon and fought her directly. However, Esdeath broke Akame's Murasame.

Akame attacks her again, surprising Esdeath with her new speed and power. Esdeath creates a wall to separate the two from the rest of the army saying that she doesn't want to be interrupted. Seeing Akame beginning to tire, she drops her rapier and creates an ice golem with her inside it so she wouldn't be able to cut her. When Akame cuts through the ice Esdeath breaks out of her ice and catches the sword and proceeded to shatter it. Akame quickly picks up Esdeath's sword and stabs Murasame's handle which pushes the broken blade into Esdeath's chest. After being stabbed she admits that she let her focus slip from Mursame after she had destroyed it. She looks up into the air and notices Tatsumi was still alive. She fully admits defeat and in her final moments, she thinks about she failed to make Tatsumi look at her and that this failure was her last and only regret.

After being defeated by Akame, Esdeath froze and shattered her own body, leaving no corpse behind. Despite this however, the arm she had amputated was retrieved by Suzuka and was preserved using her knowledge on Alchemy. Suzuka would then go into hiding with Esdeath’s limb.

There are two intros. A main one and a custom intro.