Kiamei

Kiamei is the femslash ship between Mei Raiden and Kiana Kaslana from the Honkai Impact 3rd fandom.

Canon
Mei and Kiana are both teenage students who are training to become Valkyries together at St. Freya High School. They're part of the main 3 characters in the game along with another younger girl named Bronya Zaychik. Kiana is very open towards her attraction to Mei and insists that she loves her back. A lot of the time she will blatantly flirt with Mei and make perverted comments or actions to do with her, even in serious situations. Mei usually doesn't mind Kiana's actions as long as she's able to contain her public displays of affection.

In the year 2014 (In the events of Honkai Gakuen), a Honkai outbreak took place in Nagazora and turned many into zombies. Kiana Kaslana, as a survivor of the outbreak in her school, had to make it out alive by killing zombies and gathering supplies. Some time during the apocalypse, Kiana made her way to the school's rooftop for safety, where she met another survivor named Mei Raiden who was just about to jump off of the building. When Mei began falling, Kiana noticed and quickly grabbed her hand to pull the stranger up, which is how they met for the first time. Mei was shocked at her sudden appearance, which is when the Herrscher inside of her with deadly powers awakened and began to fight Kiana so that she would leave her alone and let her die. Kiana insisted though and kept fighting, which eventually made the Herrscher of Lightning see something special in her and give up. This resulted in the Herrscher hiding herself deep within Mei again, and two the became friends as they tried to escape their school and survive together. Later on, Mei thanks Kiana for kindly saving her life, which is also when Kiana calls her cute for the first time.

Fanon
Mei x Kiana is a well known ship in the game as it's one that is shown even from the very beginning. Some people might dislike the ship because they think Kiana is delusional or they dislike her annoying personality. Some may also describe Kiana's actions towards Mei as harassment. Though of course as the story progresses and the characters keep growing, more people may be coming to like it.

People who don't ship Mei x Kiana might like the Kiana x Fu Hua ship instead.

Fandom
FAN FICTION
 * Kiana/Mei tag on AO3

Trivia

 * They're both Herrschers; Mei is the Herrscher of Lightning and Kiana is the Herrscher of the Void.
 * Kiana loves food a lot and Mei is an excellent cook.
 * In the game, there is a stigmata named "True Love Forever", which has art of Kiana in a tuxedo holding Mei who is in a bride outfit.
 * Kiana is often compared to a tuna as a joke by fans and developers of the game, in the game there is a weapon which can be equipped on Mei named "One Salty Tuna".