Claw

Claw (爪, Tsume) was a criminal organisation composed entirely of espers. They recruited espers to strengthen themselves and planned to overthrow the world government. The organisation was founded and led by Touichirou Suzuki, but since he was defeated, it now seems to be defunct.

Scar
Scars (傷, Kizu) were the upper echelon within the divisions of the organisation, composed of particularly powerful espers. When a member of Claw defied and/or challenged the boss, a wound was placed on them; according to them, this mark was representative of the boss acknowledging the recipient's skills, and thus they became a Scar.

However, this was later refuted by Shimazaki, who told them that the scars were marks to show the recipients had been "crossed out" and deemed useless by the boss; they would be disposed of once world domination was completed. The true upper echelon was later revealed to be the Super 5.

In each of the divisions stationed throughout the country, there was "division leader" who was the most powerful Scar in their respective division. There were 20 division in total. 19 of the division leaders were defeated by Teruki Hanazawa and Takeuchi, while the 7th division leader was defeated by Shou Suzuki.

The 7th Division
The former 7th Division of Claw was located in Japan. Shou Suzuki was sent to report on the division, later disbanding it after witnessing how "weak" they were. At the time of its disbandment, there were 11 Scars, led by Ishiguro.

Claw HQ
The HQ was the most important division in the Claw hierarchy, composed of the boss, the Super 5, and many low-ranking subordinates. Foreign mercenaries were once part of Claw, but they were annihilated by the Super 5 after Joseph, an assassin sent by the government, led a riot and tried to subdue Touichirou Suzuki and Katsuya Serizawa before being defeated by the latter. It was revealed by Matsuo that everyone in the 600 person army was originally a non-esper, but after Suzuki imbued them with his power, they were powerful enough in large groups to collapse buildings without breaking a sweat.

Fukuda, Higashio and Ootsuki were also once part of the HQ but joined Shou in his resistance against the boss.

Super 5
Each member of the Super 5 (5超, Gochō) was immensely powerful. The top echelon of Claw, they were the only ones the boss really trusted; he considered them the "true upper echelon". Each of the 5 members was strong enough to face a crowd of espers on their own, and they possessed a variety of unique powers:
 * Hatori: the weakest in terms of battle power, but the most useful in terms of support and influence. He can hijack and manipulate electronic equipment and signals; even he himself isn't sure how his power works. With no trouble at all, he was able to hijack every television channel's broadcast simultaneously.
 * Katsuya Serizawa: uses extremely powerful psychokinesis, capable of withstanding and escaping Joseph's immobilizing "White Noise" attack and Shou's "Charge Bomb" attack. He can imbue energy into his umbrella, using it as both defense and offense, or breaking out of psychic binds. Eventually, he becomes able use his power without the umbrella.
 * Minegishi: manipulates and grows plants with his energy. They are capable of withstanding psychic attacks from Mob. They can also suck life energy of those who get caught in them, an ability Minegishi often uses in combat. Minegishi claims that he can grow an entire jungle if he wants to, even in a terrain such as in a city.
 * Shibata: a large individual, the tallest in the series so far, who uses psychic power to manipulate his muscle mass. He fights with brute force.
 * Shimazaki: has several overpowered abilities, including teleportation, free control over his dense psychic barrier, reading his enemies movements, and locating (or "seeing") all espers in the surrounding area with a radius of at least 200 m. He is also one of the few espers who can use two psychic abilities simultaneously.