One Piece chapter 1150 was a major milestone for the series in the sense that it featured Imu fighting for the first time in the series as she took control of Gunko's body in Elbaph. Moreover, a fan on X named @tea_with_hunny has been analyzing the symbol that appeared when Imu used her magic and has theorized that it could be related to another member of the D. Clan.
When giving the symbol of the magic a closer look, it seems to have the name "Eris D. Tar" written on it, with fans knowing that a "D" has a lot of value in the One Piece universe. Naturally, this has come with a lot of speculation surrounding the meaning of the name and the value that it could have in the story moving forward, especially regarding Imu's character.
Disclaimer: This article is a speculative theory and reflects the writer's opinion.
Imu's magical book could reveal a new member of the D. Clan in One Piece
As Imu began her rampage across the land of Elbaph by possessing Gunko's body, some people pointed out how the magic circle she uses for her spells has the words "Eris D. Tar", which has resulted in a lot of theories. Some people have come up with the idea that Imu's real name is, while others think it is perhaps an ability she took from someone else or even an entity on its own.
The idea of Imu being Eris, the goddess of chaos, would make sense when considering that Luffy, the protagonist, is Nika, the Sun God, thus creating another parallel between them. Moreover, this could also suggest that the leader of the World Government was a normal human being at some point, which would make sense given the nature of the story.
Others have theorized that Imu's recent Domi Reversi ability, which allows her to turn people into demons, could confirm that the D. clan is a reference to those creatures. It would be difficult to confirm at the moment, but there is no denying that the appearance of that name on her spell generates a lot of questions regarding who she is.
More details about this

Some One Piece fans have come up with the idea that author Eiichiro Oda could be using "Tar" as a reference to Tartarus, the abyss where Titans are imprisoned, which aligns with the World Government's operations. It is also quite possible that this last name is just ordinary and lacks any special significance, yet it hints at a family dynamic that could be explored further.
There’s no denying that Imu having this name on her magic circle is an intriguing detail that could reveal more about her identity. It may also connect to Gunko in some way, although theorizing about that is challenging, especially with her current status as of this writing.
Final thoughts
It is very likely that Oda added this detail in One Piece chapter 1150 on purpose and is meant to represent a lot of Imu's character, especially for a background that fans are currently aware of. On the other hand, it could also represent the introduction of a new member of the D. Clan, which is also an interesting twist.
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