She could be a long - lost relative of Ciel. Maybe an aunt or a sister that was thought to be dead. Her appearance in the garden could be a sign of something bigger about to happen in the Phantomhive family.
She might be an undercover agent from another organization. In the world of 'Black Butler', there are always rivalries and power plays. She could have been planted in the garden to spy on the Phantomhive family and gather information for her masters.
Perhaps she is a magical being. In the 'Black Butler' universe, there are all sorts of supernatural elements. She could be a fairy or a nymph who was trapped in the garden. Sebastian and Ciel might initially be suspicious of her but then find out she can be an ally in their battles against other dark forces.
A 'Black Butler Girl in the Garden Fanfic' might focus on a female character in the Black Butler universe within a garden setting. It could explore her experiences, relationships, or perhaps some mystery in that particular location. For example, it might be about a new character who has a special connection to the garden, like she discovers some hidden secrets there that are related to the main plot of Black Butler. Or it could be about an existing female character's moment of self - discovery while in the garden.
Since it's a 'Black Butler' fanfic, likely Ciel Phantomhive and Sebastian Michaelis would be important characters. And of course, the girl in the garden would be a main character as well. There could also be other characters from the original 'Black Butler' series that might make an appearance depending on the plot of the fanfic.
One possible plotline could be that the girl is a new servant in the Black Butler household. While exploring the garden, she stumbles upon a strange object or a hidden door that leads her to a part of the Black Butler world she didn't know existed. This discovery could put her in danger as she uncovers secrets that some characters want to keep hidden.
Well, it could be about a lot of things. Maybe it's a fan - created story set in the 'Black Butler' universe that focuses on a girl in a garden. It might involve the main characters from 'Black Butler' interacting with this girl in the garden setting, perhaps uncovering some secrets or having some sort of adventure there.
Perhaps she starts to question the safety of her environment or the people around her. This could make her more cautious and observant, leading to her uncovering secrets or plots that were previously hidden. For example, she might realize that there are those who wish her harm and start to take steps to protect herself and those she cares about.
It could be a new female character with black hair and red eyes. She could be a witch who has a connection to Sebastian's past. Maybe she was once his ally but now has her own agenda in the 'Black Butler' world.
The main characters in 'Black Butler Girl in the Trunk Fanfic' would most likely start with the girl in the trunk herself. She could be a new character entirely made up for the fanfic. However, in relation to the 'Black Butler' world, we can assume that Ciel and Sebastian would be important. Ciel, as the head of the Phantomhive household, and Sebastian, his ever - loyal butler. There could also be other characters from the original 'Black Butler' series that are brought in to interact with the new character, like the other servants in the Phantomhive mansion or characters from the underworld that the story might explore.
I'm not sure who wrote it. Maybe you could search on some popular fanfic platforms to find out.
The girl OC could be a noble from a foreign land who comes to England and crosses paths with Ciel and Sebastian. She has her own motives for being there, perhaps to find something that was lost from her family. She ends up getting involved with the Phantomhive's business, and Sebastian has to protect her while also trying to figure out her true intentions. There could be a lot of drama as she tries to navigate the dangerous world of the Black Butler universe, and she might also develop a romantic interest in either Ciel or Sebastian, which would add more complexity to the story.