Hollow Hierarchy

Espada
The Espada are the top-ranked Arrancar. Each Espada member is chosen for their superior combat ability and then assigned a number from 0 to 9 (with 0 having the most reiatsu, while 9 has the least) that indicates their rank and relative power level, which is tattooed somewhere on their body. Each Espada embodies an aspect of death, which ties into their personalities, beliefs and powers. The Espada are given control over the Números and are regarded as the strongest Arrancar in existence. Similar to the power gap between captains and lieutenants in the Gotei 13, the strength, speed, intelligence, and power of the Espada far surpasses that of the average Número. As Aaroniero Arruruerie notes, all of the Espada except him were at least Adjuchas-class Menos before becoming Arrancar. With the increase in powerful natural Hollow. The espada may see a natural Vasto Lorde within the espada rankings someday even though Vasto Lorde's cannot become Arrancar ( on this forum anyways )

The Fracción are a subsection of the Números that directly serve a specific Espada. The number of Fracción for any given Espada varies ( Max of 3 )

Espada Cero - EMPTY || Tier:
Fracción - EMPTY || Tier:

Espada Ranks:

Primera - EMPTY || Tier:
Fracción - EMPTY || Tier:

Segundo - EMPTY || Tier:
Fracción - EMPTY || Tier:

Tercero - EMPTY || Tier:
Fracción - EMPTY || Tier:

Cuarto - EMPTY || Tier:
Fracción - EMPTY || Tier:

Quinto - EMPTY || Tier:
Fracción - EMPTY || Tier:

Sexto - EMPTY || Tier:
Fracción - EMPTY || Tier:

Séptimo - EMPTY || Tier:
Fracción - EMPTY || Tier:

Octava - EMPTY || Tier:
Fracción - EMPTY || Tier:

Noveno - EMPTY || Tier:
Fracción - EMPTY || Tier:

The Numeros
These Arrancar are the combat specialists. They are assigned a two digit number at birth from 10 to 99 to indicate their age (Números 10 being the oldest, while Número 99 is the youngest). The basic Número uniform consists of a white-collared jacket and robes held with a black sash. However, the uniform is customizable, giving each Número a sense of individuality. The fighting ability of Números is thought to be superior to all other Arrancar, except for the Espada (current and former and Later). These will be added as they are made.

People who are Numeros:

Name - EMPTY || Tier:
Number -10

Name - EMPTY|| Tier:
Number -12

The Exequias - These are Arrancar that are part of the execution division, apparently charged with termination of intruders and rebels. They are the equivalent of Soul Society's Onmitsukidō.

Exequias Leader:

Name - EMPTY || Tier:
Number - -1

Exequias members:

Name - EMPTY || Tier:
Number -

Name- EMPTY|| Tier:
Number -

The Privaron Espada
These are former Espada who have officially lost their rank and are assigned a three-digit number. Being former Espada, they are far stronger than normal Números. They reside in the part of Las Noches called Tres Cifras. As mentioned by Dordoni Alessandro Del Socaccio, these former "naturally created" Espada were rendered obsolete after Aizen began artificially creating Arrancar to meet his own standards. Since Aizen's defeat however..Even normal hollow have begun to be placed in this category. Because "normal" hollow have apparently begun to grow in power over the last century.

Privaron members:

Name -
Number - 100