It's about the lives and experiences of the characters in the Degrassi universe presented in a graphic novel format. It likely contains stories of friendship, love, and the challenges that teens face.
One popular 'Degrassi Fanfic' might be those that focus on the relationship development between the main characters. For example, stories about the early days of a friendship that later turns into something more romantic.
One common theme is friendship. Since Adam has a diverse group of friends in the DeGrassi universe, many fanfics explore the dynamics of his friendships in more depth. For example, how he helps his friends through tough times or how their friendships evolve over time.
One common theme could be the struggle of the pregnant character dealing with school and social life. In Degrassi, school is a big part of the characters' lives. So in fanfiction, the pregnant character might have to face rumors, judgment from peers, and the challenge of keeping up with studies.
The main characters are likely those from the Degrassi universe, such as students who attend Degrassi High. But without reading it specifically, it's hard to name them all.
Grace is presumably the protagonist. Since the story is named 'grace and the time machine story', she is the central figure. She may be an ordinary person at first, but through her association with the time machine, she embarks on extraordinary journeys through time. Maybe she's a curious person, always eager to explore and learn, which is why she gets involved with the time machine in the first place.
Natalia Grace is the person at the heart of this complex story. She was adopted, and then there were doubts and disputes regarding her age and behavior within her adoptive family.
Another theme could be personal growth. Fans might write about how Peter and Darcy grow as individuals within the context of their relationship. For example, Peter might learn from Darcy's more studious nature, or Darcy could become more open - minded because of Peter's influence. This can be really interesting to read as it shows the characters evolving.