SakuAi

SakuAi is the femslash ship between Sakura Inami and Ai Shindou from the Beyond the Boundary fandom.

Canon
Sakura is a human who wants to become a spirit world warrior(who hunt hostile dreamshades). Ai is a dreamshade who can take the form of a twin-tailed Scottish fold. After Mirai's "death," Sakura starts walking to school with Ai instead. She stands outside in the cold to wait for Ai, sometimes even falling asleep on the spot.

Fanon
They are a "rarepair" and almost unknown among the fandom. Ai's sweet and innocent personality compliments Sakura's monotone and calm demeanor, who is actually a kind and soft-hearted person.

The few fanworks of the pair are usually of Sakura finding Ai cute and getting attached and caring for her. Ai being a dreamshade, there will potentially be other spirit world warriors who will try to attack her and kill her for her youmu stone. Sakura becomes her bodyguard.

Sakura originally had a dislike for Ai for her dreamshade status. As time goes on, Ai breaks through Sakura's stoic barrier and Sakura starts to enjoy her company. Sakura learns that not all dreamshades are that bad, as she started loving one of them.

Fandom
TUMBLR 

Trivia

 * They are both anime-only characters.