Hayakoko

Hayakoko is the femslash ship between Hayate Tendou and Kokoa Shinomiya from the D4DJ fandom.

Canon
Hayate and Kokoa are both first-year students at Arisugawa Academy as well as members of the "Michiru Unit". In their biographies, it is mentioned that the two met for the first time in middle school. Feeling isolated due to her family circumstances, Hayate found Kokoa's music and resonated with it. After this, she tried her hand at writing poetry, and ended up developing a talent for writing lyrics. The two then decided to team up together, and their relationship started progressing to the point where they started dating.

They have opposite personalities. Kokoa, despite her outwardly cheerful appearance and image of an honor student at school, is in reality quite cheeky and cocky. Meanwhile in contrast to Hayate's cool appearance, she is quite carefree and sometimes does things that catch others off-guard, but she is also deeply observant of her surroundings at the same time. As such she can tell Kokoa she deeply loves her without batting an eye.

The two are first shown competing against Michiru at FROLIC, where their unit ends up losing against the latter. They talk a bit with Michiru after the battle and then bid their farewell. Upon arriving to the their dressing room, Kokoa completely explodes and starts ranting about how sore she is feeling, and how there's no way her and Hayate's unit could lose in any circumstances. When Kokoa is done, she apologizes and says with a regretful expression that Hayate is the only one she can open up to like that. Hayate mentions she calculated that Kokoa cooled down in 45 seconds, "faster than before," and Kokoa tells the former should instead tell her some reassuring words. She repeats both of the things Kokoa told her and causes her to get flustered. Hayate happily tells Kokoa she's happy she can show her true self to her, and how it makes her feel special.

Fanon
Hayakoko is currently both girls' most popular ship. The ship became quite popular the moment their characters were revealed and the two were announced to be canonically dating in their respective character descriptions. As they are still new characters, they also barely have any rival ships.

Despite having openly sapphic characters, D4DJ is known for leaving ships semi-canon, the most reknowned case being Tsubaoi and other major/"main" ships that could be interpreted as semi-canon, such as Kyoshino, Miyuharu and Nagihiiro. As such, it became a huge surprise to fans that D4DJ has actually canonized their relationship.

Fandom
TWITTER

Trivia

 * On October 11, 2022, the admin for the EN D4DJ server's Twitter account tweeted "Happy national coming out day to the entire LGBTQ+ community but also to two Arisugawa Academy first years in particular", right after the girls' profiles had been published.
 * Hayate's favorite foods are "food made with love" and "food made by Kokoa."