Ghouls are rated based upon various factors, including their basic strengths, activity levels, influence and hostility towards investigators. There are six rating levels, from SSS (the most powerful) to C (the weakest). In some cases, a tilde (~) is added to the base rating. This indicates that the ghoul is estimated to be at least that strong, but the rating may change once more is known about the subject.
Rating Assessment Criteria
The rating of a ghoul is set through evaluation of the ghoul's individual ability. The following criteria are employed to determine the rating according to their individual ability:
- SSS rated
- Criteria is unclear.
- SS rated
- Multiple Special Class Investigators are needed.
- S+ rated
- Equivalent to the ability of an average Special Class Investigator. (approx.)
- S- rated
- Equivalent to the ability of an average Associate Special Class Investigator. (approx.)
- A rated
- Comparable to a First Class Investigator.
- B rated
- Comparable to a Rank 1 to Rank 3 Investigator.
- C rated
- Ghouls of smaller ability.
In addition to the ghoul's individual ability, the actual damage caused by the ghoul is also evaluated. The rating is set in consideration of the predation and killing incidents committed by the ghoul.
For some ghouls, their influence over other ghouls is also taken into account when ratings are given.
|SSS||Eto Yoshimura (One-Eyed Owl), Yoshimura (Non-Killing Owl), Roma Hoito (The Dodgy Mother)|
|SS+||Seidou Takizawa (Owl) (after :re Ch. 60)|
|SS~||Noro, Tatara, Seidou Takizawa (Owl) (until :re Chapter 60)|
|SS||Big Madam, Hinami Fueguchi (Yotsume), Roma Hoito (Gypsy), Rio (Jail), Kaya Irimi (Black Dog), Matasaka Kamishiro (Shachi), Ken Kaneki/Haise Sasaki (Eyepatch/Centipede), Ayato Kirishima (Black Rabbit), Enji Koma (Devil Ape), Donato Porpora (Priest), Kurona Yasuhisa (Floppy)|
|S~||Nishiki Nishio (Serpent)|
|S||Bin brothers, Demon Yamada, Eto Yoshimura (Bandaged Guise), Rize Kamishiro (Binge Eater), Miza Kusakari (Three Blades), Kuki Urie, Naki, Nutcracker (after :re Ch. 23), Yakumo Oomori (Yamori/Jason), Shuu Tsukiyama (Gourmet)|
|A+||Yumitsu Tomoe (Grave Robber), Hooguro, Shousei Idera|
|A~||Nutcracker (until :re Ch. 23), Rio/Shikorae|
|A||Karao Saeki (Torso), Skull Masks Leader|
|B||Average Aogiri Tree member|