Greenblings

Soukanna is the het ship between Shin Tsukimi and Kanna Kizuchi from the Your Turn To Die fandom.

Canon
Shin (going by the name Sou Hiyori) initially takes advantage of Kanna's naivety to manipulate her into cooperating with his schemes. He eventually becomes fond of her and cares deeply for her well-being. Kanna is the only Death Game participant whose survival Shin prioritizes above his own.

During the second main game, Shin believes Kanna has the Sacrifice card, and attempts to make her the only survivor by convincing everyone to vote for her execution. When she admits she isn't the Sacrifice, Shin desperately begs the rest of the cast to vote for him to be executed instead of her as they are the only two options left. At the same time, Kanna insists on being the one to die since Shin's knowledge and hacking skills are valuable to the team.

Should the player vote for Shin, Kanna will be saddened by his death and regret not getting to know him better.

Should the player vote for Kanna, Shin will become vengeful and vow to kill everyone who voted for her.

Fanon
Soukanna is one of the most popular YTTD ships, both as a friendship and a het ship.

The age difference between the two (Kanna being in middle school and Shin being old enough to drink) is the main reason that the romantic Soukanna pairing is less common compared to other ships and platonic Soukanna. Some shippers portray it as a one-sided crush on Kanna's side.