- The fandom splits the Arrancar Arc into five arcs: the "Arrancar Invasion Arc", "Hueco Mundo Arc", "Turn Back the Pendulum Arc", "Fake Karakura Town Arc" and "Deicide Arc", even organising its TV Tropes entries accordingly. This is despite Word of God calling it a single, long Arrancar Arc in interviews. The manga itself backs up the interviews; the beginning of the Arrancar Arc (Chapter 182) is given a rare subtitle, called "Trigger for a New Concerto" to kick it off, and Volume 48 confirms at the end of Chapter 423 that the Arrancar Arc has ended and that the next volume will kick off a new arc, the Lost Agent Arc. The Arrancar Arc is therefore a single continuous arc spanning Chapters 182-423 (Volumes 21-48) and not five separate arcs as the fandom tends to think.
- There is a wide-spread belief that Ukitake's eyes are green in the manga and that his eyes being brown in the anime is a case of Adaptation Dye-Job. In fact, the anime is right. His eyes are brown in the manga, as shown in Chapter 116 and at least two supplemental databooks. The reason fans think his eyes are green in the manga is because of a special colour picture in Chapter 335 which had a "green on white" theme. Kubo changed Ukitake's eyes to green for that picture to match the theme and fans have believed his eyes are green ever since.
- A lot of the fandom is convinced that Byakuya's power is pink when released with the exception of his final technique which is white. In fact, this belief stems from the anime where Byakuya's power in shikai and bankai are coloured pink with the exception of his final bankai technique. In the manga, however, his power is white in all forms, as revealed in the colour chapters of his fight with Ichigo (which also reveals Ichigo's reiatsu is, in fact, yellow in the manga).
- It is almost universally accepted that Ichigo's father Isshin is or was a member of the shinigami Royal Guard. The manga eventually reveals he was the Tenth Division captain and introduces the five Royal Guard members. That should have killed this belief, but the theory continues to exist that he could have been the Tenth Division captain and now is secretly Royal Guard.
- There's a wide-spread view that the manga has proven that Orihime is a Fullbringer because Fullbring is activated on a physical object with a mystical light and Orihime's powers also activate via a physical object with a mystical light. Not only are many different kinds of powers activated with a light of some kind, including certain non-Fullbring human powers, but the manga doesn't make any conscious attempt to connect Orihime's abilities to Fullbring. This is in contrast to Chad who has been explicitly associated with Fullbring by the manga. That making a connection between Orihime and Fullbring is an example of fanon and not canon seems to have escaped much of the fandom's notice.
- The Hogyoku is often believed to be able to make any wish come true. Aizen explicitly states, however, that the Hougyoku is only capable of affecting desires that are possible to achieve without it.
- Large parts of the fandom believe Aizen is immortal because he has the Hougyoku inside him. However, the manga doesn't actually claim that. The person who knows the most, Urahara, says Aizen is "almost impossible" to kill but never claims he's completely impossible to kill. It's the panicky, judgemental Central 46 who interpret Aizen's state as "immortal". However, Urahara's words suggest that interpretation is inaccurate, something a large part of the fandom tend to ignore.
- Arrancars' holes are... sensitive around the edges, at least according to fans.
- There's a persistent belief within the fandom that a person loses their memories when they move on to the afterlife, reinforced by the first movie which claims the same thing. However, the canon does not support this belief. When Ichigo's group first arrives in Soul Society, they meet Shibata whose soul they saved when he was trapped in the cockatiel. He completely remembers everything that happened while he was alive, and while he was being protected by Sado. Shibata's adopted brother has been in Soul Society much longer and remembers exactly when and where he died (1947). Hisana and Rukia died together in the World of the Living and Hisana never, ever forgot they were sisters. Renji once comments that the driving goal of all people who die and come to Soul Society is to search through Soul Society to try and find the blood relatives they had in life. When Mayuri talks about all the dead quincies he experimented on, it's clear they all have memories from when they were alive and their beliefs remain intact; certainly Souken's memories never faded after his death, as Mayuri uses them to taunt Uryuu.
- In fanfics set after Ichigo fights his inner hollow and gets his mask, the hollow always calls him "king." However, in canon it only calls him that once, as an intro to the king-and-horse metaphor, and otherwise calls Ichigo by name.
Fanon / Bleach