Meiven

Meiven is the femslash ship between Raiden Mei and Natasha Cioara from the Honkai fandom.

A Shooting Star Streaking Across the Night
Raven and Mei were enemies at first, with Raven being a World Serpent agent. After reuniting with Kiana in Arc City, the two of them pursue Raven in order to stop World Serpent from endangering the city with their Project Stigma prototype. Raven reveals that the plan has already started, and that she was stalling them with this fight. Kiana is forced to unleash her Herrscher powers to stop the bomb in time and gets captured by Durandal.

Elegy to Yesterday
Kiana escapes to Nagazora, where Mei and Tesla track her down. There, they find a child named Sora, who lives with other orphans in the "Roost" and have a caretaker whom they call "Sensei." After taking Sora back to the Roost, Mei asks Sora about this sensei. Sora says that she built the Roost three years ago and isn’t often present, but she always returns every once in a while with food and presents. Sensei also created a safe zone for them to scavenge food. Sensei taught the children to do their best and help each other. Mei wants to know when this sensei will be back since she has questions, and Sora replies that she was supposed to return yesterday.

Tesla and Mei wonder why this Sensei hasn’t ever taken the children out of the city. They ask Sora at dinner, who explains that Sensei came from a poor family and went through a tragic event when she was young that left her with nothing. For many years, Sensei worked hard, saving up for a private island to house the children. The large house she was building was almost complete, until the Herrscher of the Void in Kiana woke up 4 months ago and destroyed it. Sora details the anguish her sensei was in. Mei feels sorry for her. She drops Sora back off to the Roost, where Sora talks about how Sensei saved her and taught her to live well. Mei remarks that this Sensei changed Sora’s life much like how Kiana changed hers.

Mei returns to the Roost to evacuate the children from the increasing flood in Nagazora. She and Sora encounter Benares, whom Mei is unable to fight off. Just then, Sora’s Sensei, Raven, arrives to ward off the Honkai beast. Mei is shocked that the Sensei turns out to be the assassin she fought in Arc City, but Raven tells Mei to bring Sora somewhere safe. At the Roost, Raven and Mei have a talk alone. Raven expresses her gratitude for saving the children. Mei hopes the children’s trust in Raven is not misplaced. Raven then replies that she has come to kill the Herrscher for good. Raven explains that the Honkai infection has gotten worse in Kiana, and the events in Nagazora show that it won’t be long until she is unable to suppress her Herrscher personality. Mei tries to argue, but Raven brings up how the Herrscher’s awakening 4 months ago turned out, reasoning that they have to sever the problem at its root. Raven doesn’t want to fight, but she won’t allow Mei to get in her way.

Sora stops the two from fighting. She asks Raven to give Mei a chance, because Kiana is very important to her, and saved Mei like how Raven saved her. Raven concedes, allowing Mei to follow her to Kiana, though she still sees Kiana as a threat.

Raven and Mei team up together against hordes of Honkai beasts. Raven comments that Mei is stronger than she looks. She opens up more about her motivations for working with World Serpent. Mei asks how Raven can live with the contradiction of caring for the children while also working for an organization that tried performing a deadly test on Arc City. Raven replies that all she does is for the money, and she’s willing to do anything for that. Taking care of the children makes her feel alive. Mei asks then why Raven still hates Kiana, someone who saved Arc City at the expense of herself. Raven simply says that she doesn’t think Kiana can control her Herrscher power.

The two defeat Benares together, now close to reaching Kiana. They turn towards each other, knowing what’s to come next. Mei is still intent on bringing Kiana away, so she and Raven battle. Raven pins Mei down, saying that Mei has always failed to protect Kiana, and this won’t be any different. Mei once again asks Raven why she is doing this, why the world would treat such a kind girl with cruelty. Raven notices Mei’s Honkai energy levels rising, warning that this will get her killed. But Mei would gladly trade her life for Kiana, and overwhelms Raven with a large lightning blast. Raven smiles, seeing that Mei has proved herself. She instructs Mei to take Kiana, leave as far as she can, and not to let her hurt anyone. Raven tells her not to make her regret her choice and bids farewell.

Fanon
Meiven is a rarepair, though is a fairly well-known ship and Raven's most popular ship. It was always overshadowed by Kiamei and grew less popular with the start of Elymei. Many see Raven and Mei's relationship as a more of a casual fling. Fans like the dynamic and chemistry between them, with the banter on top of a genuine friendship. Some ship the two in a polyship with Elysia, due to the popularity of Elymei and how Raven is implied to have a crush on Elysia.

They currently have 11+ works on AO3.