Elyeden

Elyeden is the femslash ship between Elysia and Eden from the Honkai Impact 3rd fandom.

Canon
Elysia and Eden were both Flame Chasers of the Previous Era. Both are now dead, though they lived on as sims in the Elysian Realm.

Previous Era
As shown in Chapter 31, Elysia and Eden first meet after one of Eden's performances. Eden disguises herself and goes to the rooftop for fresh air. Elysia is surprised to see someone else outside, as the musical isn't over; there's still curtain call. Eden expresses her dislike for curtain calls, as it overshadows the light of the play. Elysia agrees, saying that seeing the characters as actors makes for an almost sad scene. She goes on to say that she wants to savor the romantic story some more before seeing it end. Eden questions her use of "romantic" to describe the tragic play, and Elysia explains that the end of a bud emerging from the ruins makes it a beautiful, hopeful ending to a sad story. This train of thought has the two agreeing on the beauty of humanity.

Still stricken by her unique point of view, Eden asks Elysia if she's some sort of actress or writer. Elysia says that she's just another viewer, and that these are her personal feelings about the play. Eden wants to talk with her more, and asks her out to dinner at a high-end restaurant. Elysia is surprised, but Eden assures her that she always has two seats reserved there. Elysia agrees, and introduces herself to Eden.

Long into their friendship, when Eden becomes a member of the MOTHS, she shows Elysia a design for her and her team's uniform. Elysia is delighted and encourages her to show the designs to the others, though Eden is hesitant. Elysia assures her that she's one of the MOTHs now, and that the people of this era grew up listening to Eden's songs. Eden then brings up how her music can no longer soothe people's pain after battle, even Elysia's. Elysia declares otherwise, but is moved to silence when Eden continues that her 'starlight' is no longer enough. Motivated to do more, Eden requests that she get the Meta-Morph surgery.

One night, Elysia meets Eden on a rooftop looking over the MOTH's base. Elysia asks about the meeting with Dr. MEI, and Eden assures her that she's been freed from suspicion. Elysia breezily replies that she understands the suspicions placed upon her, though asks what Kevin said. Eden states that he was silent throughout the entire meeting. Elysia accepts this, then asks for Eden's viewpoint. Eden says that she knows Elysia never betrayed anyone, and will no longer take sides. Elysia thanks her, and requests that they have a drink of wine.

Elysia and Eden spend another night together talking under the moonlight. Eden can tell the Flame Chasers' meeting is still bothering her. Elysia asks what everyone said after, and Eden shares that Aponia didn't attend and that Vill-V was spaced out during the meeting. Elysia lays down against Eden, asking her to stay with her for a while. She thanks Eden, saying she is glad to have met her.

Before the last banquet, Elysia tells Eden about her childhood. Noticing the way Elysia spoke, Eden questioned if Elysia was leaving. Elysia replies that she knew this day would come and what she has to do. She apologizes to Eden. Eden says her that she knows this wasn't an easy decision for Elysia to make, and she'll walk to the end with her. Elysia is grateful, but also shares that she's afraid that her revealing as a Herrscher will lose the beautiful memories they share. Eden reassures her that no matter what, Elysia will always be a beloved friend to her. Elysia is cheered up by this, and requests Eden to sing for her at the last banquet.

After Elysia's death, Eden did not see a point of living on to the next era since Elysia once told her that her music belonged to that era.

Elysian Realm
Elysia is the first to mention Eden to Mei, saying her donated everything in the Realm lounge and is a famous star of the Previous Era. When Elysia introduces Mei to Eden, Eden turned out to be drunk, which Elysia found cute. Elysia has fun with this, telling Eden that she wants to see the gem she gave to Felis. Eden easily gives Elysia a rose-cut sapphire. Elysia tells Mei that Eden always gives gifts when she's drunk, and usually lets her keep it when she's sober.

To The Flawless
After Elysia reveals that she's the 13th Herrscher, Mei asks other Flame Chasers about it. Eden says that though Herrschers of that time were defined as enemies of humanity, Elysia retained her personality by fighting for humanity and uniting the Flame Chasers.

Once Elysia's sim dies, Mei and Su try to get information from other Flame Chasers without revealing what happened. Mei tells Eden that she's looking for Elysia, but can't find her anywhere. Eden says that Elysia has disappeared before when wanting to be alone. She muses that maybe Elysia is happily watching them look for her. Mei then asks Eden what would happen if Elysia "hypothetically" disappeared for real. Eden is silent for some time, visibly upset, then replies that such a hypothesis is impossible.

After Kevin's death, Eden is informed on the situation and steps up to lead once now that their two leaders are gone. Eden also reveals to Mei that she was guided by a flower amulet Elysia gave her during the last banquet. She explains that those with an amulet can pass it off to the one they trust most.

When Eden is the last sim left, she tells Mei that she will finish what Mei started in restoring Elysia's sim through memories, even though the action will lead to the erasing of herself. She reveals that the flower amulets held the memory of the final banquet. Before she departs, Eden tells Mei that Elysia was really born a Herrscher, and not the 13th. She sends Mei off, asking her to witness the ending that Elysia hoped for. As a farewell, she sings Elysia's favorite song.

Quotes
"Elysia’s friendly reminder! Eden is an angel. She’s gentle, beautiful, and generous."

- One of Elysia's dialogues when granting signets.

"The third to make an entrance was my BFF Eden. She was breathtaking… I was speechless."

- Elysia, Chapter 31.

"♪Oh, my love, may we never part ways♪ ♪Oh, my love, may time stay still for us♪"

- Eden singing Elysia's favorite song "The Final Scene"

Fanon
Elyeden is one of the most popular ships within the Honkai Impact 3rd fandom, and one of the most popular ships that involves the Flame Chasers. It's usually shipped alongside rather than rivaling other ships like Elymei and Elyponia. Elyeden is currently the fourth most popular Honkai ship on AO3, beaten by Kiamei and Sentihua. People like it for the dynamic of a bubbly girl like Elysia and a more subdued personality like Eden. It is also quite popular for its angst potential, as both have died.

Fandom
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Variations

 * Edelius refers to the ship between Mobius, Eden and Elysia
 * ElysiaEdenAponia refers to the ship between Aponia, Eden and Elysia