Linel

Linel (フィゼル), also known as Linel Synthesis Twenty-Eight (リネル・シンセシス・トゥエニエイト), is an Integrity Knight, and likely the youngest one, along with Fizel.

Appearance
Fizel has pale light brown hair in two braids, with droopy-looking eyebrows and eye corners. She's described as having a meek expression. She wears and ink-black uniform, identical to Fizel’s. Her uniform has a green belt with short-swords attached close to the length of a dagger, at 30 «cen» (centimeters), with a grip made of reddish wood.

Background
Unlike most children, she and Fizel 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 Fizel, 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. Other side-effects 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 the likelihood of a successful resurrection, so they trained themselves in the proficiency of killing each other cleanly in a single hit, by striking at each other's heart and head.

When only these two were left, Administrator gave up on her experiment, and allowed the girls to choose their next Sacred Task. Both chose to be Integrity Knights, but one of the high-ministers rejected them, so they proved themselves by killing the previous Synthesis Twenty-Eight, and Synthesis Twenty-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, Linel was a boy named "Ashin".
 * Along with Fizel, she is the only known Integrity Knight who was not a past Four Empires Unity Tournament winner, nor a criminal who broke the Taboo Index. Because of this, the girls do not have the illusion of having descended from the Celestial World.
 * Unlike most children, Linel was given her Sacred Task at the age of 5, instead of 10.