6. Espada (Bleach)
Espada (Spanish for “Sword”, in Japanese for “Ten Swords”) is the name of a group of Arrancars under the command of Sõsuke Aizen, they are Hollow-Shinigami, the most powerful Hollow. of Aizen, and are the main enemies of Gotei 13. Although they appear late to carry out their plot, they are the main opposing force of the Bleach story. Those of the Arrancars who have superior strength are selected and depending on their strength will be numbered in order from 1 to 10. The ten chosen people will be called Espada. According to the group’s introduction, Espada consists of 9 male members and 1 female member. Each member is assessed by their superiors and then numbered from 1 to 10 (number 1 is probably the strongest) indicating their rank and level of power, tattooed somewhere on their body.
7. SOS Team (Suzumiya Haruhi)
The SOS Team is a club founded by the heroine Suzumiya Haruhi and her friends. Suzumiya Haruhi is a beautiful, intelligent and eccentric girl. She wanted to meet aliens, time travelers or powerists, so she founded this club with the motto: Save the world by bringing joy with the group Suzumiya Haruhi (SOS). The crew members include Haruhi, Kyon, Nagato Yuki, Asahina Mikuru and Koizumi Itsuki.
8. Yorozuya (Gintama)
Yorozuya – also known as Universal Shop, All Things Snail, People do all kinds of jobs… founded by Gin. This organization accepts to do any job, but does nothing decent, mainly destructive and harmful. This is also the home and workplace of our three cores: Gintoki, Shinpachi, Kagura and the pet Sadaharu. Yorozuya’s address is on the 2nd floor of Mrs. Otose’s house, above the Snack Otose pub, Kabuki district, Edo. Yorozuya is sometimes referred to as the Sakata family.
9. Vongola Famiglia (Katekyo Hitman Reborn)
Is a Mafia corporation in Italy, specializing in training top assassins. This corporation is vacating the 10th position (Juudaime) so they posted an advertisement: “…Will train your child to become a leading leader in the new era“, “Education is not the problem. Reborn!” to recruit. A schoolboy from Japan – Tsunayoshi Sawada has been targeted for this position. The members of the family are mainly young men, often wearing very elegant suits.
10. Dollars (Durarara!!)
The Dollars Gang is a secret organization founded by student Ryugamine Mikado at Raira Academy. No one expected the gentle student Mikado to be the leader of a gang. But the Dollars are not like the gangs that specialize in shady deals, paying each other in this bustling metropolis. It was born with the purpose of changing lives, doing good deeds, in order to reduce society’s bad prejudices about “gangs.”
Source link: Top 10 most popular organizations in manga/anime (P.2)