Shiori Sakurai
Shiori Sakurai 3.png
General Information
Species 3/4 Human
1/4 Shinobian
Age 10 (Ben 10)
11 (Ben 10: Omniverse)
15 (Ben 10: Alien Force)
16 (Ben 10: Ultimate Alien and Ben 10: Omniverse)
Affiliations Ben's Team
Occupation(s) Hero
11th grade Student
Apprentice Swordsman
Powers and abilities
Abilities Kenjutsu
Super Speed
Weapon Summoning
Equipment Itto (formerly)
Nitto (formerly)
Relatives Mizuki Sakurai (deceased mother)
Kiyoshi Sakurai (father)
Shiki Sakurai (older brother)
Chihiro Sakurai (cousin)
Aika Sakurai (cousin)
Kohaku Sakurai (cousin)
Hitomi Sakurai (cousin)
Yoshito Sakurai (cousin)
Hotaru Sakurai (cousin)
Rika Sakurai (cousin)
Masumi Sakurai (cousin)
Hiroshi Sakurai (uncle)
Kana Sakurai (aunt)
Nao Sakurai (uncle)
Akio Sakurai (uncle)
Hisako Sakurai (aunt)
Chiharu Sakurai (aunt)
Alias Tomboy/Clumsy Tomboy (Kevin)
Lollipop Girl (Kevin)
Klutz (Kevin)
Filthy Tomboy (Charmcaster and Kevin)
Tomboy Princess (Kevin)
Sakurai Shiori
Voice Actor Janice Kawaye (Ben 10 and Ben 10: Omniverse)
Hynden Walch (Ben 10: Alien Force, Ben 10: Ultimate Alien and Ben 10: Omniverse)
Hayley Kiyoko (Ben 10: Alien Swarm)
First Appearance And Then There Were 10

Shiori Sakurai is a Human/Shinobian immigrant Plumber from Tokyo, Japan and a member of Ben's Team. Shiori first appeared in the original series, when her father sent her to a summer-long road trip on America in the care of Max Tennyson, while he will take her older other, Shiki Sakurai and her friend and "Senpai", Izumi Kurokawa to another summer-long road trip on the same country. She is a very skilled swordsman.


Shiori in the original series.

Shiori in Alien Force (Seasons 1-2)

Shiori's outfit from the Ben 10: Alien Force Season 3.

Shiori is a girl of Japanese descent with dark brown eyes and black hair with bangs on both sides of her face with the right side longer than in the left side. In the original series her hair was worn short with two purple hairpins forming an 'X' on the left side of her bangs. Later in Alien Force, she has grown out her hair from short to shoulder-length and now has added two more purple hairpins on the left side of her bangs below the one she has on it. In Basic Training and Inspector Number 13, her hair was tied in a short ponytail, but she still wore her hairpins. In Ben 10: Omniverse, Her hair is more straighter and no longer wearing the purple hairpins she has on the left side of her hair, instead wearing it in a short ponytail, while letting the rest of it hang loose. She is almost always seen with a lollipop sticking out of her mouth.

In the series Ben 10, Shiori wore a short-sleeved lavender shirt attached with a white, sailor-style collar with a purple strap and a purple necktie with white stripes that has a white coiled tip with a purple stripe, sky blue cuffed shorts held by a purple belt with a silver buckle, dark and light purple-striped thigh high socks and purple sneakers. She also wore a purple choker around her neck and purple wristbands on each wrist.

In the first and second seasons of Ben 10: Alien Force, Shiori wears a light purple wide-necked shirt with dark purple sleeves over an indigo singlet, a short dark blue denim skirt and purple sneaker boots. She still retains her dark and light purple-striped thigh high socks and purple belt, but replaced her purple choker for a black one. She also replaced her purple wristbands with silver bracelets on each wrist. In the third season, she wears a purple strapless one piece dress under an elbow-length indigo mini jacket, navy blue stockings and purple high-heeled knee-high boots and lacks her silver bracelets. She also wears her black chocker.

In Ben 10: Ultimate Alien, Shiori wears to a combination of her outfit from the first two seasons of Alien Force and her outfit of its third season, which now consists of a light purple strapless top under an elbow-length purple mini jacket, her old dark blue denim skirt with her purple belt and her silver bracelets. She also wears her black choker, white stockings and her purple high-heeled knee-high boots.

When going to school, she wears a school uniform, which consists of a dark blue blazer with a tight-fitting beige sweater-vest underneath over a long-sleeved dress shirt underneath with a red bow tie, a dark grey miniskirt, navy blue thigh-high socks and brown penny loafers and holds a navy blue shoulder strap bag.

In Inspector Number 13, she wore a crossed strapped purple top with indigo linings, a blue skirt, light purple leggings and purple high-heeled shoes. She still wore the same silver bracelets on each wrist.

In Ben 10: Omniverse, she wears a lavender-striped purple jacket resembling Ben's Jacket, but it lacks the number 10 on it over an indigo camisole, a short blue denim skirt resembling the one she wore, but in a different tone of blue, black thigh-high socks, and purple folded high-heeled boots. She retains her trademark belt, silver bracelets and black choker and still wears the same purple backpack.


Shiori is a tomboyish, cheerful, bright, energetic, friendly, absent-minded, airheaded, outgoing, care-free, feisty, rebellious, short-tempered, spunky, aggressive, enthusiastic, optimistic, fun-loving, upbeat, sweet and clumsy. This attitude can make her easy to get along with people, even Ben and Max. She is also naive and socially-awkward, because of her former lack of experience of America, childlike and rather clueless, such as being easily offended or being prone to childish dreams. Shiori, despite being impulsive, has phasmophobia, the fear of ghosts.

She gets mad at Gwen's snarky attitude towards Ben and Kevin's arrogant attitude, which occasionally are so bad that she is driven to violence.

Shiori has a fondness of sweets.

Under her energetic exterior, she is actually a melancholy girl who is afraid of losing the ones around her and has yet to cope with their deaths.

Shiori rarely holds a grudge or negative feelings towards an enemy, as she is rude and hostile towards them. However, she does, for a short time, hold a grudge against Kevin Levin but eventually forgives him and comes to consider him an ally and a friend. She also seems to be completely against her friends when they betray her, this was because, she was betrayed by Ryuji when they were younger.


Early life

Shiori Sakurai is the second child born to Kiyoshi Sakurai and Mizuki Sakurai. At one point, her mother, Mizuki fell sick.

Ben 10

Ben 10: Alien Force

Ben 10: Ultimate Alien

Shiori in Ben 10: Ultimate Alien.

In the sequel that takes place a few weeks later, Shiori is now sixteen years old. Her wardrobe has altered once again, wearing a combination of her outfits from Alien Force. Shiori now wears her dark blue denim skirt with her purple belt and bracelet from her old outfit, but now wears a lavender strapless top and elbow-length purple mini jacket that is similar to the indigo one she wore in the third season of Alien Force, and also keeps her purple high-heeled knee high boots and stockings from the third season, but instead of navy blue stockings they are now white.

In Hit 'Em Where They Live, When, Zombozo and other villains teamed up to take revenge on the Tennysons and company, and kidnapped Ben's mom Sandra. She, along with Ben, Gwen and Kevin, went to Zombozo's hideout to save his mom. They split up to find her, Shiori went to the haunted house, hoping that she would be there. However, since she was afraid of ghosts, she tried to escape, but to no avail, since the doors and windows closed. She is confronted by Charmcaster, who tells Shiori she won't escape the haunted house unless she defeats her, as they fight, Shiori tried to escape, but Charmcaster attack her. Shiori fled from her mana attacks by using super speed, which she couldn't control. Fortunately, Shiori stopped by pinning her sword to a wall, but tripped to a grate of water hiding inside the haunted house. She eventually managed to trick Charmcaster into walking directly over a grate of water. Freezing her in a mass of ice, Shiori was able to chain the sorceress to the grate before encountering Kevin to look for Ben and Gwen

Ben 10: Omniverse

Love Interests

See: Shiori Sakurai/Love Interests

Powers and Abilities

Before discovering her Shinobian powers and abilities, Shiori has always used her katana, Itto (later the Nitto and then Santo), to attack her enemies. However, when Kevin Levin angered her so much, she unleashed an energy burst that knocked him down. Later after visiting Shinobi, she discovered that her powers were of alien origin in Above and Beyond, where it is revealed that she and her brother, Shiki are Shinobian descendants.

Shiori has the ability to generate, manipulate and project energy, water and ice. She can also use super speed, teleportation, healing and weapon summoning.

Energy Manipulation

Shiori can manipulate and create blue energy at will. She can create energy blasts, shields, barriers. Shiori's energy abilites allow her to use the power of energy constructing allowing her to make many different types of structures like, hammers, protective helmets, battering rams, beams to grab and throw enemies, stepping stones/platforms to carry her and others though air, safety nets. When Kevin calling Shiori tomboy reminded her of Ryuji calling her the same insult, she became angry that her eyes turned blue with light blue rings around the pupils and released a sudden energy burst that hurled him to the wall. She can also infuse her weapons with this ability.


Shiori is able to generate, control, project and manipulate water at will and even mold it into a wide variety of shapes. For example, she can create water whips, water bullets, water walls, water shields, water pinwheel, water drills, waterspouts, water vortex, a water dome, and bubbles. She also creates water whips from her fingers. Shiori used this ability for the first time when she bent the water around a fish to lift it above the boat while fishing with the Captain Shaw.



Super Speed

Shiori had little control of this super speed.


Before discovering her dormant innate Shinobian powers, she is an expert swordsman.


Being part-Shinobian, Shiori is weak to radiation; it will make her feel much pain and burn her.

When feeling inner confusion or fear, Shiori's powers begin to malfunction, making her unable to use them.

Aliens Shiori used in Inspector Number 13

Relationships With Other Characters


  • Shiori has phasmophobia, or spectrophobia, a fear of ghosts. However, she fought Zs'Skayr while he was possesing her and she used her Shinobian powers to almost kill him, yet, she still afraid of ghosts.
  • Shiori's outfit from Alien Force seasons 1-2 and habit of having a lollipop sticking out of her mouth make a reference to Mizore Shirayuki from the manga and anime Rosario + Vampire.
  • Her first name "Shiori" is japanese for "bookmark", while her last name "Sakurai" is japanese for "well of the Cherry blossom".
  • Shiori is capable of running in heels, despite her clumsiness.
  • In the japanese dub of the series, she has changes:
    • Shiori addresses Ben as "Ben-chan" and Gwen as "Gwen-chan". After Shiori began to trust Kevin completely, she tried to find a nickname of his liking, considering "Kevin-chan" and "Kev-chan", much to Kevin's annoyance, but was unable to create a good one. Kevin then told his new teammate to "just call him Kevin", and Shiori frowned as she was again dismissed by her former enemy.

See also

Main Characters
Ben Tennyson | Gwen Tennyson | Izumi Kurokawa | Kevin Levin | Max Tennyson | Rook Blonko | Ryuji Maruyama | Shiki Sakurai | Shiori Sakurai
Supporting Characters
Julie Yamamoto | Manny Armstrong | Helen Wheels | Alan Albright | Jimmy Jones | Azmuth | Professor Paradox | Cooper Daniels | Ship | Eunice
Other allies
Plumbers (Tack, Vreedle Brothers (Octagon Vreedle, Rhomboid Vreedle), Magister Pyke, Magister Korwak, Magister Hulka, Joel Tennyson, Gordon Tennyson, Betty Jean Tennyson, Wes Green, Edward White, Mrs. Dalton, Mr. Hawkins) | Tetrax Shard | Gluto | Galactic Enforcers (Ultimos, Synaptak, Tini) | Reinrassic III | Myaxx | Xylene | Verdona Tennyson | Colonel Rozum | SATC (Lieutenant Steel) | Galvan (Retaliator) | Sugilite | Ignatius | Sandra Tennyson | Carl Tennyson | Frank Tennyson | Lili Tennyson | Technorg | Harvey Hackett | Hector | Elsgood | Sheriff Mason | Kai Green | Ishiyama | Camille Mann | Kiyoshi Sakurai
Former allies
Elena Validus | Phil | Squire
Deceased Supporting Characters and allies
Devin Levin | Magister Labrid | Magister Prior Gilhil |Pierce | Sir George | Winston | Victor Validus | Kwarrel | The Sentinel | Mizuki Sakurai
Prisoners of Aggregor
Bivalvan | Galapagus | P'andor | Andreas | Ra'ad
Charmcaster | Charmcaster's Stone Creatures | Charmcaster's Stone Animals | Argit | Baz-El | Simian
Generator Rex Heroes
Rex Salazar | Yumi Sakurakouji | Kenji Yamabuki | Bobo Haha | Agent Six | Rebecca Holiday | White Knight | Caesar Salazar | Akira Kazami | Ren Johnson | Edwin Bluestein
Future Heroes
Ben 10,000 (Ultimate Alien) | Ben 10,000 (Alternate Timeline) | Gwendolyn Tennyson (Alternate Timeline) | Shiori Sakurai (Alternate Timeline) | Gwendolyn Tennyson (Alternate Timeline) | Kenny Tennyson (Alternate Timeline) | Devlin Levin (Alternate Timeline) | Kaori Sakurai (Alternate Timeline) | Kaoru Sakurai (Alternate Timeline) | Max Tennyson (Alternate Timeline)
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