This article contains potential spoilers for One Piece's Elbaf arc.

The level of mystery in One Piece's Elbaf arc is among the greatest in the entire franchise. Ever since the arc began, many new details have been revealed that cast light on some of the most important events in history and even given a lot of context for how certain character journeys played out. The latter is the truest regarding the prince of the island, Loki.

Despite him trying to put on an evil and overly assertive exterior, the Giant actually holds a lot of sadness in his heart, which has been the chief reason behind his actions in the first place. In the world of One Piece, Loki really only has a single friend; the mysterious 'Mosa' who has been speaking to the prince through a Transponder Snail for years. In this article, let's go over the most likely options for whom this mysterious ally could secretly be.

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Many Think That Elder Jarul May Have Been Mosa This Whole Time

The Current Leader Of Elbaf

First Appearance	One Piece, Chapter 866, "Natural Born Destroyer"
Story Arc	Wholecake Island

A very likely option.

The way that Oda is writing this arc very clearly seems to imply that Jarul is the true identity of Mosa. Of course, most fans suspect this to be a very deliberate Red Herring, since it's never the most likely answer, but Jarul is a good option from what we have seen of him, especially during the Elbaf flashback, which explains his personality quite well and the state of Elbaf during the old era of One Piece.

I'm too old for this stuff. Politics is a young man's game.

In this flashback, Jarul was seen to be a close friend and confidant of the late King Harald. In fact, he was even shown earlier on as one of the only people on Elbaf who didn't outright hate Loki or were afraid of him, with the two of them even being seen speaking to one another on friendly terms. Mosa's last message to Loki ends with them stating that the enemies are coming, which just happens to coincide with Jarul and the others getting overrun by Imu's forces, which many think is the most damning fact about his true identity.

Ida Is Yet Another Very Likely Option Due To Her Caring Nature For Loki

She Always Cared For Loki

First Appearance	One Piece, Chapter 1153, "The Birth of Loki"
Story Arc	Elbaf

Ida was one of the few people who actually cared for Loki.

Before Loki was even born, King Harald had an affair with Ida, who was a Giant from the Samuwanai Island, far away from Elbaf. This was the mother of Hajrudin, but due to the customs of Elbaf, Harald wasn't permitted to marry her and take her to the castle, though he still helped her out on the island. Eventually, Ida opened up a bar in Elbaf's underworld, and she remained close to the king.

If you abandon Loki, I'll drown you a hundred times!

After Loki was born, Ida cared for him as a son to the best of her ability, despite him always hurling insults and mistrust at her. Because of this, and the fact that her ultimate fate remains unknown, many fans believe that she is a very good option for Mosa's true identity, due to her natural caring side for Loki and the fact that she was one of the only people to never treat him like a monster.

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Princess Shirahoshi May Have Been In Contact With Loki All This Time

A Popular Fan Theory

First Appearance	One Piece, Chapter 612, "Taken By The Shark They Saved"
Story Arc	Fishman Island

An unconventional theory that lines up well.

Although it has its detractors, this theory of Mosa actually being Shirahoshi has been gaining a lot of traction recently. Of course, much of what goes into making this theory is quite vague, but fans have noticed some notable parallels between both of the characters, and what Mosa has said through the Transponder Snail also seems to indicate a connection to Shirahoshi.

It feels like I've known you since I was a kid, even though we just met for the first time...

In the Elbaf arc, Mosa tells Loki about a certain incident they went through where they suffered a lot, to which Loki replied that if he were in their place, he would have 'killed them all'. Fans think that he could be talking about the recent Reverie, where Shirahoshi was attacked and almost kidnapped by the Celestial Dragons. Moreover, Mosa's comments about 'them coming' could be a misdirection by Oda, done so fans would think that the enemies are on Elbaf but could actually be somewhere completely different. After Caribou's induction into the Blackbeard Pirates, it could be that the Blackbeard Pirates attacked Fishman Island in order to take Poseidon, which may be what Mosa meant.

Davy D. Xebec Could Still Be Alive And Be The True Identity Of Mosa

The Greatest Pirate In History

First Appearance	One Piece, Chapter 957, "Ultimate"
Story Arc	Wano

Possibly one of the greatest twists in the entire series.

Though incredibly unlikely, one of the most bizarre theories regarding Mosa states that their true identity is none other than the legendary pirate, Davy D. Xebec. Of course, the common belief is that he met his end in the God Valley Incident, but there is a growing contingent of fans who believe that he may have survived the entire ordeal with the help of one of the series' most important characters.

There we have it! Loki has been seriously hurt!

The friendship between Xebec and King Harald was unconventional but is already being regarded as one of the best in all of One Piece. When all the powerful forces met on God Valley, Xebec supposedly met his end, but this theory states that while he was at death's door, Harald also came to the island and brought him back to Elbaf, and he currently resides in the Heaven Realm that the story hasn't explored even a little bit. This theory is incredibly far-fetched, but it would make for the greatest twist in the entire story.