I'm not sure specifically about 'lemon' (which often implies inappropriate content in fanfiction terms) fanfiction for Robin and Beastboy. However, there are many great, clean fanfictions about them that focus on their friendship, adventures together, and character development. You can try looking on well - known fanfiction platforms like Archive of Our Own and filter for appropriate works about these two characters.
Archive of Our Own (AO3) is a great place to start. It has a large collection of fanfictions, and you can use the search and filter options to specifically look for works about Robin and Beastboy that are rated as appropriate. You can also set filters to exclude any mature or inappropriate content tags.
Slade could be included as an antagonist. His evil plans could somehow be related to the relationship between Raven and Cyborg. Maybe he wants to use their newfound love against them, or he tries to break them apart to weaken the Titans as a whole.
Well, in some fanfictions, Cyborg might develop more of an emotional side. For example, through his interactions with Beast Boy, he could become more in touch with his feelings. Beast Boy, on the other hand, could become more responsible. Maybe he starts to take Cyborg's advice more seriously and grows up a bit.
Common themes in 'cyborg x starfire lemon fanfiction' may include physical attraction and desire between the two characters. But we should also be aware that 'lemon' fanfiction can sometimes cross the line into inappropriate territory. It could also potentially explore how their different backgrounds and personalities interact in a more sensual context, but this is a very niche and often not - so - appropriate area of fanfiction. It's better to focus on more positive and appropriate aspects of their relationship in general fanfiction.
There could be some 'cyborg x starfire lemon fanfiction' out there. However, 'lemon' often implies more mature or suggestive content which might not be easily accessible on all platforms. Some fanfiction communities have rules against such content. If you're looking for a more general and appropriate take on their relationship, you might find some well - written stories that focus on their friendship or adventures together without the 'lemon' aspect.
Maybe in the fanfiction, Cyborg and Robin find themselves in an alternate dimension where they are the only ones who can save that world from destruction. It could involve them making difficult choices and sacrificing things to succeed.
A plot could revolve around Raven getting injured during a battle. Cyborg takes it upon himself to nurse her back to health. As he tends to her, they have long conversations that lead to a deeper understanding of each other. This newfound closeness could then develop into a romantic relationship in the context of the fanfiction.
Perhaps a story where they accidentally swap powers for a while. This would lead to humorous situations as they try to adapt to each other's abilities while still being themselves. They could also learn a lot about each other during this time.
Cyborg is often depicted as strong, both physically and technologically. He's the one with all the cool gadgets and a bit of a tough - guy exterior, but deep down he has a heart of gold. Robin, on the other hand, is the strategic mastermind. He's intelligent, quick - thinking, and always has a plan. In fanfiction, these traits are usually amplified to create more dramatic situations.