Yumi Ishiyama

Yumi Ishiyama is one of the main characters from the Code Lyoko series.

The tallest and oldest of the group, alongside William. A good student, she is a Japanese national at the boarding school, living off-campus with her family. She is one grade above the rest of the Team, which proves sometimes problematic. While she may have feelings for Ulrich, Yumi is exasperated by his inability to articulate his crush. A running joke among fans is XANA's tendency to single her out for attack.

In the AWA fics, Yumi is listed as a purchased prisoner from the Slave Fortress.

Appearance
Yumi has a short black hair styled in a razor-bob cut and has dark-colored eyes.

Personality
In regard to Yumi's personality, her instant trademark is how she is shown to always prefer black clothes, basically the American goth look; with a black sweater, black pants, and black boots. Her Season 4 outfit is like her sports clothes consisting of a dark gray blouse and dark pants. She wears the same boots as in Seasons 1-3 (this being seen in Cold Sweat where when an embarrassing childhood Halloween photo of her is seen, she is wearing big black boots in the picture). She inspires coldness and distance at first glance. Rather abrupt and often of a sarcastic humor, she can seem particularly stiff and ironic. However, this appearance exists only to hide her generous and sensitive inner nature, because behind this mask hides a being filled with warmth and with human qualities such as kindness, helpfulness, delicacy, and sincerity. Yumi is shown to prefer getting acquainted and knowing people first before opening up to them, but once trust is established, she assumes a limitless fidelity towards the people whom she likes.

A fine observer, she is adept at understanding people and emotions. Good at sports, very smart (as seen by her responses to difficult situations), a hundred percent natural, she is the perfect opposite of Sissi and is very popular, although she seems oblivious to it. Also, differing from girls her age, most of Yumi's friends appear to be boys. Aelita is obviously her closest (and only known) female friend. Yumi is also a very applied pupil, who excels particularly in the literary subjects. Considered as having great scholastic potential, she has the respect and trust of her professors which can be seen throughout the series.

Abilities
Her virtual form is a geisha with a collapsible razor-edged fan, with which she can deflect energy bolts. The fan is controlled telekinetically, and can be thrown as a ranged weapon, returning to her hand after an attack. Yumi also exhibits telekinetic power over several objects of the Lyoko landscape — most often boulders in the Mountain or Desert sectors.

Trivia

 * Yumi owns a Totoro stuffed animal that she keeps on her bed.
 * Yumi set the school record for 100 meter sprint with a time of 14.35 seconds in Tip-Top Shape.
 * Yumi and Aelita are the only Lyoko Warriors who were prisoners of a Guardian. They are also the only ones who fell into the Digital Sea and got temporarily deleted.
 * Yumi was the only one who ever defeated Aelita when Aelita was under X.A.N.A.'s control, as seen in The Secret.
 * Yumi is the only character that was virtualized by Odd, as shown in Crash Course.
 * In Hard Luck, Yumi reveals that her least favorite monsters created by X.A.N.A. are Kankrelats, and that her favorites are Krabs.
 * Yumi and William are the only Lyoko Warriors other than Aelita to be attacked by the Scyphozoa.
 * Yumi is also the first person to be devirtualized by a Ninja.
 * Yumi is, so far, the only Lyoko Warrior with two additional weapons.
 * In the original pilot episode, Garage Kids, Yumi possessed strong telekinetic abilities while on Earth as well as Lyoko.