In addition to the Ghostfacers as a group, individual members like Ed and Harry could be considered main characters. They often lead the group's investigations. When they meet Castiel, their personalities clash in interesting ways. Ed might be overly eager to learn about Castiel, while Harry could be more cautious.
Castiel is a central character as well. His stoic and otherworldly nature contrasts with the more down - to - earth and comical nature of the Ghostfacers. His interactions with them drive much of the story, whether it's him trying to understand their human ways or them trying to figure out his angelic motives.
The Ghostfacers would probably be excited. They are always eager to encounter new elements in the supernatural world, and an angel like Castiel is a huge deal. They might start asking him all sorts of questions right away. Castiel, on the other hand, might be a bit bemused. He's used to more serious situations and these guys with their cameras and loud voices could be a bit much for him at first.
There might also be a story where the Ghostfacers end up helping Castiel in an unexpected way. Perhaps they have some knowledge of a particular haunted location that is relevant to Castiel's mission. At first, Castiel is skeptical of their abilities, but they prove themselves useful in the end.
Another theme is friendship. His relationships with the other characters from Supernatural and Ghostfacers are often explored. How he bonds with Sam, Dean, or the Ghostfacers crew is a big part of many fanfictions. In some, he might form a really strong friendship with a new character introduced in the fanfic world.
Well, in the fanfiction, Castiel might be initially confused by the Ghostfacers' methods. He could be intrigued by their enthusiasm despite their somewhat amateurish approach to the supernatural. Maybe he'd end up helping them out in a case without really meaning to at first, like when they misinterpret a sign and Castiel corrects them, leading to a successful hunt.
There's also 'Castiel's Redemption'. This fanfic focuses on Castiel's journey of self - discovery. It shows his interactions with the other characters from Supernatural and Ghostfacers in a very engaging manner. It's full of emotional moments and great character development.
Obviously, Gabriel and baby Castiel are the main characters. Gabriel is the one who leaves, and baby Castiel is the one left behind.
Typically, one of the main characters would be the spy. This could be a suave, highly - trained individual with various skills. The other main character could be the person who meets the spy, perhaps an innocent bystander or someone with their own unique role in the story.
Well, clearly Heron and Will are the main characters. Heron could be a character with unique abilities, like being able to communicate with animals. Will might be a brave and adventurous type, always looking for new challenges.
Dean Winchester is often a common character. Since he has a strong bond with Castiel, he might be involved in the time - travel events either directly or through Castiel's actions in the past that affect him in the present.
Obviously, the Marauders which include James Potter, Sirius Black, Remus Lupin, and Peter Pettigrew. And then there are the Evans family members. Most likely Lily Evans, who is quite important as she has her own story arc and connection to the Marauders, especially James. There might also be other Evans siblings or family members depending on how the fanfiction is written.