Mayumi Kirisaki

"The situation may seem bad now, but we just need to keep hopeful! At least, I think..."

- Danganronpa: Trigger Happy Havoc.

Mayumi Kirisaki (桐崎 雅弓) was a student at Hope's Peak Academy's Class 78th and participant of the Killing School Life. A former hypnotist serial killer known as Ultimate Murderous Fiend (超高校級の殺人鬼, lit. Super High School Level Murderer), her real name is Takako Chigusa (千種 タカ子) but she changed it after joining an idol group, becaming very famous in the country and receiving the title Ultimate Pop Sensation (超高校級のアイドル, lit. Super High School Level Idol).

Appearance
Mayumi was a very tall, slim girl with middle-lenght, silver hair and purple eyes. She wore a white seifuku with pink lines and a red tie underneath a beige sweater, dark blue skirt and high white socks with brown shoes. She also wore a black jacket that is completely over her skirt and nearly her socks.

When at the identity of Takako Chigusa, she had long black hair and blue eyes, what implies that she had dyed her own hair and used contact lenses after she joined the idol group and changed her name.

Personality
Mayumi was a very polite, kind and gentle person. Her overall brilliant aura made everyone like her and trust her word absolutely. Although be a idol was not her dream, she loved them and she loved to be one. As an idol, she believes that her job is to make everyone smile even in a situation like the killing game. She used to cheer up her classmates and even with the killers, she remained polite and tried to understand their side.

As Takako Chigusa, she hated men with her soul because of her father. Her main targets were men but since she hypnotized Sapphire Tennoji, it seems that it is not limited to them. Her idol group gave her a chance to live as another person and she grabbed it with her life, changing her personality. As she was rude and agressive, when she became an idol, Mayumi's attitudes were more graceful and thoughtful.

Talent and Abilities
Mayumi was an idol and such, was very athletic and could singing and dancing independently. She was also skilled at hypnosis art and could do it without any instruments besides her own voice, as she could manipulate both Anna Kiryuin and Sapphire's actions with it; it is also heavily implied that she used her abilities in Yozora Hoshinomiya to make her more cheerful than depressive. Apparently, her stealth is a level above as she was able to divert the police and change her identity without being caught.

Early life
Born as Takako Chigusa, she lived in an abusive home. Her father would always sexually harass her and beat her mother, Wakako Chigusa, while wasting their money in beer. This attitude has irritated Takako and such, she killed her father in front of her mother. The police came and Wakako got arrested instead of Takako as she defended her daughter and took the blame to herself. Takako's emotional state got worse and she started killing almost every man she would find and disappeared without traces.

As she discovered a way to kill without being caught, Takako was now using hypnosis to do her crimes but this life was tiring her. One day, however, she was found by a group and they helped as their hideout. They were an idol group and Takako started to like their job. Their former leader asked her to join them but she denied, as being the country's attntion would be bad for her, who is a criminal. She gave her an idea and said that she would hide her true identity if she changed her name and appearance entirely. She did and so, became an idol known as Mayumi Kirisaki.

She quickly became her leader and the most famous among them. She came back to school in her first year of high school and attended Light Evening Girls High School (光夕女子高校), the same one as her groupmates until she was invited by Hope's Peak Academy.

Killing School Life
Mayumi was among the sixteen that were trapped inside Hope's Peak Academy. Apparently, she woke up with Yuichi Hayase in the A/V room and they tried to make the machines work, but were unsuccessful. Yukio Shizukane and Amaya Hayama entered and they introduced themselves to each other. She was there when Monokuma presented their eternal school life and motive. It is heavily implied that not just her group was in her motive video but her imprisioned mother was also.

She was very understandable with Enju Otsuka's actions and was truly sad with her and Ryo Fukukado's death. After all this, she got really close to Yozora and used her abilities to cheer her up; they were almost best friends now. When Monokuma presented their secrets as a motive, Mayumi felt that she was in danger: if the world discovered that she was a murderer, she would not be the one affected as her group would be dissolved and arrested for hiding a criminal. Thinking that, she hypnotized Sapphire to kill Yuichi and kill herself afterwards as she knew that she would not die since she did not kill directly. However, she did not expect that Monokuma would break his own rules and executed her and Yozora instead of everyone else.

It was due to that and Amaya's efforts that Yukio could confront Monokuma and, by extension, the mastermind because he did break his own game rules.

Creation and Development
Mayumi was not created to be the Ultimate Murderous Fiend. According to Miika, the first game should not have one as the idea of a serial killer fit better with the concept of Genocide Jack from the first original game and she didn't want to repeat. When she thought about another identities, she thought that it would be a good idea to make an idol criminal and that is how Mayumi's background was made.

Her surname (桐崎) means "small peninsula of paulownia" which makes reference to her hair and eye color (it is also based on Chitoge Kirisaki from Nisekoi). Her first name (雅弓) means "elegant bow" and it is the same one as the singer and voice actress Mayumi Izuka.

Trivia

 * Yukio's first impression about Mayumi was as follow: "My Lelouch! I loved her so much, seriously, her personality is amazing, and being with her makes me very happy, her aura of joy will certainly help others (I hope at least), I can't wait to talk to her again."