As of the latest chapters I've read, Megumi is still alive in the manga. Usually, such major character deaths are significant plot points and would be well-publicized if they occurred.
Typically, megumi fanfic often focuses on his personality traits. His stoicism and determination are often highlighted. For example, in many fanfics, his unwavering resolve in the face of danger is a central theme.
Well, Megumi's story in the manga was full of twists and turns. She had to overcome various obstacles, and there were also some unexpected developments in her relationships with other characters.
Nope, Megumi is alive. The author has chosen to keep Megumi's character alive to continue developing their story and interactions within the manga's world.
One great Tsugumi x Akane fanfic could be 'Tsugumi and Akane's Unlikely Bond'. It focuses on how their different personalities draw them together in unexpected ways. They start off as just classmates in the Soul Eater Not world, but gradually develop a deep friendship that might turn into something more.