- "To the Phantom Thieves causing an uproar in Japan: Do not speak of your false justice. We do not need the spread of such falsehood. We are the true executors of justice. However, we are magnanimous. We will give you an opportunity to repent your ways. If you agree to a change of heart, we will accept you as our own. If you reject our offer, the hammer of justice will find you. We are Medjed. We are unseen. We will eliminate evil."
- —Medjed, Persona 5
is a very minor Egyptian god who was depicted in the Book of the Dead as a figure covered in large bland cloth with only the eyes and legs visible. This image later has become a sensation in modern Japanese popular culture. Nothing else is known about Medjed other than its name.
- "We're running out of time. Let's move on to your next target... ...I stand corrected. It was they who targeted your group first, wasn't it? The identity of your opponent... is this. We have no pictures. Even their names and identities are unknown. If what you told me is true, then this "Nav" thing you've mentioned wouldn't have worked in this case. How did you target them? Tell me everything."
- —Sae Niijima talking about Medjed, Persona 5
Medjed is a group of high-profile hackers that come onto the scene after the Phantom Thieves of Hearts have succeeded in the third heist against Junya Kaneshiro. They criticize the Thieves for being hypocritical and believe only they are qualified to bring justice to Japan. They would recognize the thieves if they join their group. It is right after this declaration, Futaba Sakura under the guise of "Alibaba" contacts the protagonist as she is aware of his alter ego and asks his group to steal her heart in exchange for her skill to strike back Medjed. However, upon realizing the Thieves will need to know more about her to enter her palace, she panics and calls off the deal. Before they have time to take any action, Medjed declares victory as the thieves remain silent and as a punishment to the thieves' admirers, they will rip their properties off.
After some time of inactivity from Medjed, the Thieves assume they simply dropped matters and decide to celebrate in an expensive sushi restaurant in Ginza. On their way home however, they are informed by Goro Akechi that Medjed has provoked the Thieves once again and read from the groups home page that the hackers have demanded that the Thieves turn themselves in and reveal their true identities before August 21st or they will launch a hacking attack which they claim will have a devastatingly destructive impact on Japan's economy. Realizing the severity of their threat, and the hopeless nature of taking on an anonymous entity with their usual methods, the Thieves decide to make direct contact with Futaba Sakura by finding her room in Sojiro's house and once more ask for her help in stopping Medjed in exchange for stealing her heart. Once the Phantom Thieves successfully steal Futaba's heart she easily puts a stop to Medjed. As she reveals, the original Medjed was Futaba herself, along with a group of online friends. The Medjed that declared war with the thieves, however, were not the actual Medjed but the Conspiracy who is also responsible for pushing the heist request ranking against Kunikazu Okumura in Phantom Aficionado Website, which Futaba realizes after Kunikazu's death (as the true Medjed uses her own distinct programs).
Later when the thieves infiltrate Shido's Palace, it turns out the one who actually plays Medjed during this whole incident is the president of an information technology company who has connection to Masayoshi Shido. Futaba is furious at this identity thief and demands the gang to beat his Shadow to obtain the invitation required to access Shadow Shido's representative chamber instead of negotiating peacefully.
- In the Japanese version, the kana to render the group name is not the same as the one actually refers to the Egyptian god (メジェド, Mejedo)?. The group name uses the regular "エ" (e) but the god's version uses a small "ェ" for modifying the vowel of the preceding kana "ジ" (ji) to form "je".
- Medjed's closing tagline in their every announcement is very reminiscent of "We are . We are Legion. We do not forgive. We do not forget."