The Elbaph Arc in One Piece has introduced some powerful characters like Loki and Gaban. But one of the most talked-about figures is yet to make an appearance. Mosa, the mysterious voice speaking to Loki through a Den Den Mushi, is quickly becoming a point of fan speculation.

Loki is hated by the giants, and no one wants to speak with him. But while he was locked up, Mosa was the only person he felt he could talk to. No one knows who this individual really is and what their motives are. They’re just a voice on the other end of a line for now. Still, their friendship with Loki has made fans wonder if Mosa has a bigger role\\\\\\\ to play in the Final Saga.
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Mosa’s Appearance

So far, Oda hasn’t revealed anything about how Mosa looks. The manga hasn’t shown their face, body, or even a shadow. Their name might not even be real. In Japanese, the word “mosamosa” can mean “shaggy” or “hairy,” which led to the official VIZ translation calling them “Shaggy.”
The mystery around Mosa’s appearance has caused fans to speculate that Mosa could be a giant in hiding, an ancient fishman, or even someone connected to the World Government. Others think they might be a familiar character using a new name. The lack of information from Oda so far makes Mosa one of the most intriguing characters revealed in the Elbaph arc.
Loki’s Only Friend in Prison
What makes Mosa so important is its relationship with Prince Loki. Despite never meeting in person, the two formed quite a friendship through calls. While Loki was in prison for killing his father, King Harald, Mosa managed to get past his rough edges and bond with him. They talked to each other, shared personal stories, and confided about their troubles.
Loki respected Mosa so much that he called them with the suffix kō, a sign of friendly respect among giants. If Loki considers a stranger his friend, it could mean that Mosa has something in his past that makes Loki feel for him. One Piece Chapter 1151 gave a hint that Mosa might’ve had a tragic past of their own and stuff that they’re currently dealing with.
A Traumatic Past and Sudden Goodbye
Mosa is not just a good listener. They have a past filled with pain. They once mentioned to Loki that something had happened to them that changed them forever. This suggests they might have been a victim of violence or betrayal, which may be why he wanted to talk to someone like Loki, who’s also imprisoned for a crime that might have more to it than what meets the eye.
In one of their final calls, Mosa told Loki that they would not be able to speak with him again for a while. When Loki sensed danger and asked what was happening, Mosa denied anything was wrong. They thanked him for being there for them and ended the call. The sudden end left Loki shaken and raised concerns about whether Mosa was in danger. This shows Mosa might be dealing with problems of their own.
Could Mosa Be More Important?

While Mosa may seem like a minor character, their conversations with Loki hint at a bigger role in the Final Saga. Some fans believe Mosa could be an ancient creature, possibly an extinct Fish-Man or a sea being inspired by Jörmungandr from Norse mythology.
Mosa’s ability to speak with Loki rules out Sea Kings, suggesting they might be a rare type of Fish-Man with lost knowledge. This ties into the theme of Ragnarok that’s building in Elbaph. In Norse mythology, Jörmungandr releasing his tails is one of the signs of the beginning of Ragnarok. If Mosa shares that role in One Piece, they could be key to the fall of the old world and the birth of a new one, standing beside Loki as both witness and guide.

Another fan theory suggests that Mosa might be a current or former prisoner of the Celestial Dragons, while some fans think they are a Celestial Dragon themselves, whose values differ from their peers. If Mosa is a Celestial Dragon, his knowing about Loki and being able to contact him would make a lot of sense.
This theory holds some weight because in the recent chapter, Mosa said they can’t talk to Loki for a while and this happens to also be the time when Mariejois is burning. This could just be a mere coincidence, or it could mean Mosa is at Mariejois and is caught up in whatever conflict that is going on there.
Final Thoughts

Mosa might not have done much yet, but they left a powerful impact on Loki. In a world where alliances, betrayals, and power struggles dominate the story, Mosa offered something rare. They gave Loki emotional support and connection at a time when he had no one else.
Their story is not finished. Whether Mosa is just a friend or someone deeply tied to Elbaph’s secrets, they have already shaped part of Loki’s journey. Fans are eager to know who Mosa really is, why they had to say goodbye, and if they will return as this arc reaches its climax.