Akiko Narumi

Akiko Narumi (鳴海 亜樹子) is the lead female character of         Kamen Rider Double and head of the Narumi Detective Agency after inheriting it from her deceased father, Sokichi Narumi.

Part in Story
Akiko is Shotaro Hidari's landlady and boss, though she serves as a personal assistant to Shotaro while on the job and keeping him at bay by slapping him with a green sandal with different inscriptions on it each time (sometimes two at once!); she uses this on others as well, including Dopants. She came from Osaka to continue in her father's place, initially unaware that Sokichi died until the events of Begin's Night. Before taking control of the Agency she met a little girl named Riko, who's spirit helps her in the case of the Puppeteer Dopant. She nearly gets herself killed by Money Dopant when Akiko reveals herself.

During the cases of the Sweets, and Puppeteer Dopants, Akiko played a major role in finding out the Dopants' causes and getting Horinouchi on the right track after he is defeated. She also got involved in the Nightmare Dopant case, in a dream becoming Kamen Rider Double but ends up under the Dopant's powers. Fortunately she is freed from its influence when the Dopant is defeated.

During the events of Movie War Core she married Ryu Terui, trying to place a ban on his being a Rider when it interfered with the ceremony. However, after seeing all the things her father went through as Skull (via the Memory Memory) and hearing his reasons for staying a Rider, she let him continue being a Rider and they married, her father's spirit walking her down the isle.

During the events of W Returns: Accel she threatened divorce due to how secretive Ryu was being.

Chacha
Chacha (チャチャ) is the wife of Hideyoshi that greatly resembles Akiko Terui (née Narumi).

Chacha is portrayed by Hikaru Yamamoto (山本 ひかる), who previously portrayed Akiko Terui (née Narumi) from Kamen Rider W.

Personality
Akiko appears rather childish for her age (20) and due to her young appearance and attitude, Shotaro refers to her as "Middle school Girl" (女子中学生) and sees her as a threat to his public image. She has a black and white view of the world and tends to say "I didn't hear about this!" (私聞いてない!) when she is caught off guard by something. Despite her somewhat childish personality, she has shown signs of promise as a detective, particularly in her ability to decipher clues that leave Shotaro, Philip, and Ryu stumped, as well as being extremely protective of clients, a trait she shares with her father. Akiko harbored a crush on Ryu Terui, and although her feelings were initially ignored, he eventually returned them during the events of W Forever, as they watched the fireworks together and fell in love. They eventually married in Movie War Core.

Abilities
Akiko is a regular human with no unique physiology and lacks Gaia Memories unlike most other major characters of the series. Still she uses the aforementioned sandals with different writings on them during certain situations that seem to work even against Dopants. She also talks in her sleep which helped out in the Nightmare Dopant case.

At first Philip showed no attention to her after researching about her from the Gaia Library, but was later interested on her unusual lucky suggestions, which often gives inspiration in solving most of their Dopant cases.

Her appearance of becoming Double lead to the creation of Double Ganbaride cards featuring giant versions of Akiko's signature sandals during Double's Finisher.

Kamen Rider Double
In one episode she was dreaming where she is the body of Kamen Rider Double and Shotaro is the mind, Akiko uses Double's powers to a good effect but was defeated after just getting punched in the face, though this could've been just a way to reveal the Dopant's identity. As Double, the Double Driver calls her the "Masked Beautiful Girl of Naniwa" during the transformation.

Gaia Memories
The Gaia Memories (ガイアメモリ) are mysterious USB flash drives imbued with the powers of the Earth itself. Originally created with funding by the Sonozaki Family, these Gaia Memories end up in the possession of Shotaro and Akiko, and can only be used through the Double Driver. Two can be inserted into the Double Driver, allowing Shotaro and Akiko to transform into Kamen Rider Double. Shotaro's left-half Memories called Body Memories (ボディメモリ) determine the type of attack or weaponry that Double uses.


 * Joker Memory (ジョーカーメモリ): The Joker Memory, also known as the Trump Card Memory (切札の記憶), allows the user to increase fighting potential, becoming the Skill Warrior (技戦士). When used, half of Kamen Rider Double becomes the black Trumping Left Half (切り札の左半身). When the Joker Memory is placed in the Maximum Slot on the Double Driver, it allows Double to execute the Joker Extreme Rider Kick.


 * Metal Memory (メタルメモリ): The Metal Memory, also known as the Steel Memory (鋼鉄の記憶) or the Fighter Memory (闘士の記憶), empowers the user with great strength, becoming the Superpowered Warrior (怪力戦士). When used, half of Kamen Rider Double becomes the silver Fighting Left Half (闘士の左半身).


 * Trigger Memory (トリガーメモリ): The Trigger Memory, also known as the Sniper Memory (銃撃手の記憶), turns the user into an expert marksman, becoming the Gun Warrior (銃戦士). When used, half of Kamen Rider Double becomes the blue Sniping Left Half (狙撃手の左半身).

Portrayal
Akiko Narumi is portrayed by Hikaru Yamamoto (山本 ひかる). As a child, Akiko is portrayed by Saho Ueda (上田 紗帆) in Kamen Rider Skull: Message for Double.