Akanatsumi

Akanatsumi is the femslash ship between Kaede Akamatsu and Natsumi Kuzuryu from the Danganronpa fandom.

Canon
Kaede and Natsumi have never interacted in the canon storyline. But due to their extremely similar looking appearance, fans theorize a possibly connection between both girls. In Danganronpa V3, it is mentioned that Kaede had a twin sister, but considering she was dead at that point, there was no way of knowing if this was true or false. This led many fans to believing it was either Miu Iruma or Natsumi herself. But it is easily debunked due to Danganronpa V3 being the 53rd game in the series, meaning Natsumi death, taking place in Despair Arc which is a prequel to the whole series, was way before anything in V3. Both girls also have opposite personalities, as Natsumi is very aggresive and Kaede is rather cheerful.

Fanon
This ship is extremely rare in the fandom as they never interacted. Their similar appearance is one of the only traits they actually share. Both are pale, have blonde hair around the same length, bangs parted on a certain side, thin, and have similar outfits.