HibiKana

Hibikana is the femslash ship between Hibiki Hojo and Kanade Minamino from the Pretty Cure fandom.

Canon
When the two were young, they used to be best friends and played together often. They would go to an old church to listen to music and sing together. However, at their school entrance ceremony, Hibiki waited for Kanade under a sakura tree like she promised, but Kanade never showed up. She was later found talking with other people. This made Hibiki think that Kanade forgot, which caused them to go seperate ways. One day, the two stumbled upon each other at the old church they used to go to.

There, they found Ellen, Siren's human form. When Ellen found out that Hibiki and Kanade had a G Clefs, major MacGuffins for this series in their hearts, she tried to steal them. However, the G Clefs started to glow, turning into Cure Modules. This allowed them to transform into Pretty Cure for the first time and defeat their first Negatone. In the end, though, they still hated each other, which caused them to be out of sync. They never agree with each other until one episode later, when it was revealed that there was a mishap in their meetup under the sakura tree. For the rest of the series, the two were inseparable, and decided to continue their friendship.

Fanon
This ship gained popularity due to the two being best friends. The trope "opposites attract" is also prominent here, which makes it even more popular in the precure fandom.