Mirko

Mirko is the femslash ship between Asahina Mirai and Riko Izayoi from the Pretty cure fandom.

Meeting Riko
Mirai is up one night, noticing how big the moon looks and runs out to her balcony. She suddenly spots something flying around spinning out of control until it falls into the trees. Mirai decides to head out and look for it, only to be stopped by her mother, who asks her where she is going. Mirai tries to tell her mother about what she saw, only to get told she shouldn't stay up late even if she's on spring break.

The next morning, Mirai is still wondering what she could have seen that night. Her grandmother suggests it was a magician flying on a broom which excites Mirai even more. Seeing her daughter so eager, her mother lets her go and search for it. She then tells Mirai to pick out a pendant that she likes as a reward for helping her with housework. She chooses a pink diamond-shaped one and puts it on her neck. She then hurries outside with her teddy bear, Mofurun, in a basket with her. As she's walking through the park, Mofurun falls onto the ground without Mirai noticing. She then hears a voice that tells her she dropped something, turning around she runs back to pick it up. She then thanks the person who told her only to not see anyone until she looks up and sees a girl riding on a broom. She chases after her and introduces herself. The magician tells her she has no time and that she's in a hurry. She then speaks the magic words "Cure Up! Ra-pa-pa!" and takes off on the broom once more as Mirai grabs on and tells her not to leave. The magician runs out of energy and the broom loses its magic. As both girls start to fall, Mirai's pendant begins to glow and she notices the magician has the same one but in purple. They both float in the air for a while as they are both surprised that they have the same pendant but soon fall back down after realizing they are hungry.

Mirai treats the magician to strawberry melon bread to restore her energy and asks if she can ride her broom. The magician tells her that it's only supposed to be used by one person but since she helped her with getting something to eat, she decides to show Mirai some magic. She demonstrates it with her magic wand on a cat, trying to make it speak but is only able to make it yap and say "blah, blah" repeatedly. Mirai suggests for the magician to use her magic on Mofurun. She tells Mirai that it's impossible because toys can't talk in the first place. Mirai tells her that her grandmother gave Mofurun to her when she was born so they are like siblings and she wishes she was able to talk to it. She thanks the magician again and she tells her that her name is Riko.

As Pretty Cure partners, they soon build an unseperable bond. This bond grows over the course of the series, with Riko temporarily enrolling in Mirai's school as well. It is also strengthened by them taking responsibility and raising Ha-chan.

Fanon
It is currently one of the most popular and loved ships in the fandom due to the season's popularity.

Theres multiple fanart of them.

Fandom
FAN FICTION

Mirai/Riko tag on AO3

TUMBLR

Mirai/Riko tag on Tumblr

DEVIANART

Mirai/Riko tag on Devianart

PIXIV

Mirai/Riko tag on Pixiv

Trivia

 * The two kissed in the manga
 * Riko oftens acts flustered towards riko