Yylfordt Granz

is the 15th Arrancar in Sōsuke Aizen's army and one of Grimmjow Jaegerjaquez' five Fracción.

Appearance
Yylfordt had long blond hair worn in a similar style to Byakuya Kuchiki's. What remains of his Hollow mask is on the top of his head, and looks like a broken helmet.

Personality
Yylfordt is a sarcastic, effeminate Arrancar. He commonly refers to other characters as "brother" when speaking. He was the older brother of Szayel Aporro Granz, the 8th Espada. It is unclear what his relationship with his brother was, but it seemed less than positive, given Szayel's cold disregard of his death.

History
Yylfordt Granz was part of a group of Menos formerly led by Shawlong Kūfang, they wandered Hueco Mundo looking for a way to continue their evolution into Vasto Lorde. One day the group came across an Adjuchas by the name of Grimmjow, after seeing his power Yylfordt and the rest of his group pledged allegiance to him stating that he would become their king.

After some time had passed Yylfordt as well as the rest of his group noticed that they were not advancing in their evolution. Shawlong announcing this only to a snort from Grimmjow who said he would then leave the group. Shawlong however asked Grimmjow to eat a piece of them so he could grow stronger and they would not regress back to Gillian.

Arrancar arc
When Grimmjow leads the second invasion on the human world, Yylfordt along with Shawlong Kūfang, Edrad Liones, Nakeem, and Di Roy are part of his group. When the group dispatches to search for opponents, Yylfordt heads toward the Urahara Shop and confronts Renji Abarai. During the fight he clearly overpowers Renji's Bankai until Renji receives some assistance. In the anime he was assisted by Ririn, Noba and Kurōdo. Using their skills they were able to buy Renji some time. After disposing of the three Modified Souls he was attacked by Ururu Tsumugiya who took control of the battle and drove him to release his Zanpakutō.

With his power released he gored Ururu and took a direct hit from Jinta Hanakari's bat with no injuries. Renji then intervened and saved both the children. Renji is finally allowed to release his limiter and the effects of this on Yylfordt are seen, as he can hardly hold back Renji's powers. Renji uses this element of surprise to finish off Yylfordt via his Baboon Bone Cannon.

Hueco Mundo Arc
Yylforddt was shown briefly alongside Grimmjow and the other Arrancar in Grimmjows fraccion during a flashback into Grimmjows past. He was alongside the other Arrancar of Grimmjow's group attempting to become a Vasto Lorde.

Powers and Abilities
Swordmanship Specialist: Yylfordt is fairly powerful for his rank, able to fight off Renji Abarai's Bankai (at 20% power) without releasing his Zanpakutō. In contrast, however, he is little match for the surprisingly strong Ururu Tsumugiya in her normal state, but easily dispatches her once he releases his Zanpakutō.

Zanpakutō
. Yylfordt's zanpakutō looks like a regular katana, except that its' guard is diamond-shaped.
 * Resurrección: the release command is . When Del Toro is released, Yylfordt's upper body enlarges and is covered in armor shaped like a bull's head and torso, while his mask seems to completely regenerate and give him horns in the process. In this form, he walks on four legs and uses his horns to skewer opponents.

Quotes

 * "Skewer, Del Toro!"

Trivia

 * Yylfordt Granz is the only Arrancar to have a sibling, in his case, younger brother Szayel Aporro Granz.
 * It is also possible that Yylfordt could be one of the silhouettes shown in Szayel Aporro's lab with the bottom half shown. Also, Szayel did say that he attempted to heal him.