Fizel

Fizel (フィゼル), also known as Fizel Synthesis Twenty-Nine (フィゼル・シンセシス・トゥエニナイン), is an Integrity Knight, and likely the youngest with Linel.

Appearance
Fizel has straw-colored hair in a short cut, with her two eyes accented upwards. She's described as having an expression of resolve. She wears and ink-black uniform, identical to Linel's. Her uniform has a green belt, with short-swords attached, close to the length of a dagger, at 30 «cen», with a grip made of reddish wood.

Background
Unlike most children, she and Linel received their Sacred Task at the age of 5, instead of 10. Their task was to perform in an experiment by Administrator, where she was partnered with Linel, along with 28 other children, and forced to kill each other. In these experiments, Administrator would resurrect any child who died, and had them continue the experiment. Fizel admitted to having forgotten many days worth of memories, after a resurrection. Other side-affects included people returning as "different people", and some just returned as lumps of meat. Fizel and Linel discovered that killing someone in a single hit increased that likely-hood of a successful resurrection, and they did so by striking at each others hearts and heads.

When only these two were left, Administrator ended her experiment, and allowed the girls to choose their next Sacred Task. Both chose to be an Integrity Knight, but one of the high-ministers rejected them, so they proved themselves by killing the previous Synthesis Eight, and Synthesis Nine. After doing so, Administrator made them a special case, and allowed them to become Integrity Knight trainees.

Alicization Rising
After hearing that there was an intruder from the Dark Territory, in the Axiom Church, the two decided to prove themselves as real Integrity Knights, by killing the intruders themselves, in front of the other Knights. They planned to fool Kirito and Eugeo, (the intruders) by pretending to be "sister apprentices" of the Axiom Church. However, as soon as they came into range, they seemingly poisoned the duo, and dragged them to the 50th floor, from the 29th, while telling them their back-story.

After arriving at the 50th floor, Fizel showed the 5 knights guarding this floor, the two intruders they captured, and began to argue with Fanatio.

Trivia

 * In the web-version, Fizel was a boy named "Bisuten".