Cecile

Cecile (セシル, Seshiru) is the main antagonist in the special one-shot chapter Seeking the Sky of Freedom. Born and raised on an unknown plantation at Grace Field House, Cecile was a childhood friend of Krone, whom she reunited with while training to become a Sister at Grace Field Headquarters. Cecile was two years older than Krone. Due to her age, Cecile was considered to be one of the house's "premium quality goods".

Appearance
As a child, Cecile was overweight. She has straight and long straight blonde hair and blue eyes. She wore the standard Grace Field uniform- a plain white long sleeved button-up shirt and a white skirt along with brown boots. Her identification number, "72684", is tattooed on the left side of her neck.

Since she began her training to become a Sister, Cecile has lost weight and is now a tall, slender young woman. She now wears the standard Sister trainee uniform, which consists of a long sleeved dark gray shirt and dark gray sweat pants.

History
Cecile was born as an orphan at Grace Field on March 23, 2017 and sent to one of the adjacent plantations a year later in 2018, growing up alongside Krone and several other children. As a child, Cecile was overweight and often got bullied because of her size. She was very close to Krone and the two shared a strong sisterly bond. At the age of twelve, she was shipped out and began her training to become a Sister at Grace Field Headquarters. Two years later, she reunited with Krone during her training.

Personality
Cecile deep down is a very kind and caring woman, and tends to show her affection through "tough love"; when betraying Krone, in her final moments alive she claims it was all to teach her how to survive the sister program and grow to become a successful mother. Cecile cares deeply for those around her, especially Krone who grew up with her on the same Plant in Grace Field, and who is two years younger than her.

During her time in the Sister program, Cecile was known to always report suspicious behavior, making her out to be someone attentive to details as well as unfeeling in certain aspects. It can also be said when she notices the blue thread on the back of an embroidery displaying Headquarter's layout. Cecile was also very intelligent, diligent, and dutiful, as she is one of the Sisters trainees closest to getting the position and she presumably got perfect test scores as a child.

Plot
Cecile first appears during the special side story Seeking the Sky of Freedom, when she comes forward to bring Krone's missing embroidery project. If it had not been for her, Krone would've been eliminated and killed. Much later, after returning her embroidery project, the two eat a meal together, talking about their younger years on the Plant they grew up on. As a child, Cecile was a bit chubbier than the other children, and was often made fun of because of it. However, Krone was the one to always protect her when she was bullied by their brothers. Both women thought the other had been shipped out, and now with the knowledge of Cecile being alive in front of her, Krone cries.

During a "briefing" Grandma has, Cecile brings the idea to Krone that they should escape the Sister program. Her plan is complicated, but to Krone it seems like it could work: the two girls would steal clothes to appear as caterers, and leave through the back. The chips in their heart can be deactivated by the watch Grandma carries on her person. Not only that, a pattern on the back of an embroidery Cecile has lays out the pattern of the Headquarters, all outlined in blue thread. Krone agrees to the plan, now comfortable with how likely they'll be able to escape

Over the course of the Sister program, Cecile gets as much information as she can, memorizing patterns and how long those patterns take. Once the plan is ready, the girls discuss what they'd like to do once on the outside; Krone said how she would've loved to play sports, and get married and become a mother later on in life. Cecile, however, claims she always wanted to be just like Krone, planning on dying her hair black and getting it curled. Cecile even claims that she doesn't like how it's blonde and thin, hating how it never had the volume Krone's did. She then expresses the reason why she wanted to be like Krone was because she was always there to protect her from the boys who bullied and harassed her, always being by her side. She then relishes in the idea of them living as normal girls, wearing cute outfits and falling in love.

After watching a sister attempt to escape, and killed just moments away from getting her freedom, Krone starts to have second thoughts. Cecile still instills some hope in Krone, telling her if it's them they'll be able to escape. That day, Krone attempts to steal the watch Grandma has, planning on disabling their chips and escaping. However, at the same time, Cecile is already warning Grandma that her watch is getting stolen, and rats out Krone to her. As Krone is in shock from how Cecile could betray her, she reveals she's the one who hid her embroidery that one time, and reminds her of something she said earlier: "Everyone's going to do something to stay alive". Krone is taken away, and thanks to her, Cecile is now expected to be picked by Grandma to become a Sister.

Eventually, Cecile is revealed to be getting eliminated rather than move up in her rank, due to running an operation of escapees, making the layout of Headquarters, and instructing Krone to steal the watch. She is then dragged off, and killed. However, it is revealed that in her final moments that she intended to get caught and be killed so that Krone could live. The Grandma only chooses one girl per class to be given the position of a Sister, with all of the others being "rejected" (killed). As a result, all of the girls must compete with each other for the position. Cecile knew that escape was impossible and there was no way for both of them to live so she knew she had to sacrifice herself so that Krone could live. She also knew that Krone was always second when it came to scores and tests, meaning she had a good chance of becoming a mother if Cecile was eliminated. Additionally, Cecile was also planning on betraying Krone to toughen her up and make her cold-blooded, which would give her the motivation she needed to survive and eventually become a Mother. Her only regret was never witnessing a truly free sky they both could see after they escaped the farms.

Intelligence
Cecile is almost always number one in her class, excelling in tests both physical and mentally. Prior to Krone's arrival in the Sister program, Cecile was the top of the class and the most likely to get the position. Like all Sister trainees, she presumably got perfect test scores as a child, which allowed her to live to the age of twelve and be given the option to train to become a Sister which she was shipped out.

Strength
While not shown, it's expected that Cecile is very skilled in hand-to-hand combat, since all sisters and mothers are expected to be exceptionally strong to out-beat children who attempt to escape, or carrying and retrieving children after wandering off in the fields.

Deceptiveness
It's possibly hinted that Cecile is very deceptive and a bit of a liar, reporting suspicious activity to Grandma before Krone's arrival. She lies for her own benefit, but also for Krone's. In her final moments alive, she claims that all of the things she laid out for Krone to rat her out were laid there purposefully for Krone's own benefit. Not only was she able to trick Krone into trusting her, but she was also able to trick her into thinking she betrayed her for her own self-gain, when it was all for her little sister.

Craftsmanship
Like other Sisters, Cecile is exceptionally good with sewing and embroidery, being able to craft a layout of Headquarters on the back of embroidery.

Krone
As a child, Krone was very kind to Cecile, often being there to protect her from the boys who bullied her for her weight. The two bonded over the years until Cecile was shipped out, and Krone was left to tend to herself until being shipped out as well. The two girls reunited in the sister program. It's believed Krone and her have a very strong sister-like bond, Cecile referring to Krone as her "precious little sister" in her final moments alive. It's believed she deeply loved her sister in her final moments.

Sarah
Cecile was loyal to Sarah and had managed to gain her trust by always reporting any suspicious activity among the trainees.

Trivia

 * Cecile is one of the few chubby characters depicted in The Promised Neverland franchise, with the only others being Mark, Chucky, Adam, Alex Mikhaylov and the Bearded man.
 * She is very quick to lose her weight however, due to being in the Sister program for a while.
 * Cecile is very heavily related and depicted with butterflies, which represent womanhood, marriage, and transformation in Japan. In other cultures, it can have different meanings, often being associated with love or transformation to a sense.
 * Due to her pin straight blonde hair and blue eyes, it can be believed Cecile comes from a European background.