Level 0: Advanced Rank
This rank is held exclusively for Organization leaders. If an organization leader drops their rank, they will be demoted. Unlike the other Tier ranks, the 0 tier has no sub divisions.
1st level: Captain/Jōnin Rank
Tier Level 1: This rank is for veterans. Someone of Shunsui, Starrk, or Itatchi's level level would be an example of this.
Tier Level 2: This is for characters who are more powerful than 1-3, but not quite 1-1 yet.
Tier Level 3: On this level, your character is on par with seasoned characters. Some examples of this level are Byakuya Kuchiki Grimmjow Jeagerjaques, and Kisame Hoshigaki.
Tier Level 4: This is for characters who are more powerful than 1-5, but not quite 1-3 yet.
Tier Level 5: Here is where you are on the same level as new Captains or new
2nd level: Lieutenant/Chūnin Rank
Tier Level 1: Renji Abarai is a good example of this Tier. Others would be Sakura and Sasuke
Tier Level 2: Rangiku Matsumoto and Rock Lee are good examples of this.
Tier Level 3: This is for characters who are more powerful than 2-4, but not quite 2-2 yet.
Tier Level 4: This is a tier level for characters who have power over their first level of powers, but are nowhere close to reaching the second.
Tier Level 5: Marechiyo Omaeda would fall into this category along with Shino Aburame.
3rd level: Officer/Genin Rank
Tier Level 1: This level would be for a highly seated officer who has good knowledge of their shikai and Genin ready to take the Chūnin exam. Yumichika would be an example of this class.
Tier Level 2: This is for characters who are more powerful than 3-3, but not quite 3-1 yet.
Tier Level 3: This level is for the middle class seated officers and Genin. Most of these characters have access to their first power levels, but have just earned it recently.
Tier Level 4: This is for characters who are more powerful than 3-5, but not quite 3-3 yet.
Tier Level 5: This level is for the lower characters; Shinigami who can hear their zanpakuto's voice but cannot hear it's name quite yet, or Genin who haven't mastered a particular ninjutsu yet.
4th level: Member Rank
This is the Unseated Shinigami, Just obtained their power Human, Garden variety Numero, Student of the Shinobi Academy etc. It's the most basic Tier level. As with the 0 Tier, this category will not have sub divisions.