They should also consider the context. If Sebastian is crying during a battle, it could be a sign of his deep connection to the situation or the people involved. Writers can use internal monologues to show what he's thinking while crying. For example, 'Sebastian thought to himself as the tears streamed down his face, that this was a moment he never expected to feel so deeply about.' This gives readers an insight into his emotions.
Maybe it has to do with his past. As a demon, he has a long history. There could be some memories from his past life or experiences with other demons that resurface and cause him to cry. It could be related to a long - lost friendship or a betrayal he once faced.
One popular theme is Sebastian's relationship with Ciel in different AU (alternate universe) settings. For example, in a modern AU, how they adapt to a world without the traditional master - butler dynamic. Another theme is exploring Sebastian's past as a demon, like his experiences before making the contract with Ciel. And some fanfics focus on Sebastian's interactions with other characters from the 'Black Butler' universe in unexpected ways, such as teaming up with Grell for a particular task.
In many Black Butler fanfics, the relationship between Sebastian and Grell is complex. Grell has an unorthodox infatuation with Sebastian. Sebastian, on the other hand, often sees Grell as an annoyance or a tool depending on the plot of the fanfic. Sometimes, fanfic authors play with their dynamic in a humorous way, like Grell's over - the - top attempts to get Sebastian's attention while Sebastian just wants to complete his tasks for Ciel.
A good one often has well - written characterizations. Sebastian's personality should be in - line with the original anime or manga. The ticklish aspect should be incorporated in a way that feels natural to his character, perhaps as part of a light - hearted moment or a unique plot device.
Sebastian might fall for a young girl who was an outcast in society. She had a special gift of seeing demons. At first, Sebastian was only interested in her because of this unique ability. But as he spent more time with her, he started to care for her in a different way. He would secretly bring her little treats and protect her from other demons who might want to harm her. Eventually, his feelings grew into love as he realized how pure her heart was despite all the hardships she had faced.
In fanfiction, Ciel might be crying due to a resurfacing of his past traumas. His experiences of losing his parents and being tortured are deeply scarring. A well - written fanfic could explore a moment where a trigger, like seeing something that reminds him of his family's death, causes him to break down.
There is a story where Sebastian has to deal with a group of unruly guests at the Phantomhive manor. Despite their rudeness and attempts to cause chaos, Sebastian with his calm and efficient manner manages to outwit them and make them leave in a rather embarrassed state, all while maintaining the perfect image of a butler.
There could be a lot of hilarity. Maybe they are in the middle of a demon - related task and suddenly, a magical spell makes them ticklish. Sebastian, with his pride, would try to hide it at first but Claude would quickly notice and start to tease him. This would lead to a sort of power struggle between them as they both try to maintain their composure while also trying to get the upper hand in this unexpected tickle situation.