Nendo could be a great addition. His simple - minded yet loyal nature can add some humor and unexpected twists. For example, he might accidentally almost expose Saiki's powers while trying to be helpful in a situation involving Teruhashi.
The length of Kokomi's story quest can vary depending on your playstyle and how quickly you progress through the tasks. Generally, it might take a few hours to complete.
Well, in fanfiction about Saiki Kusuo and Teruhashi, often their relationship is explored in really interesting ways. Sometimes it shows Teruhashi's attempts to get closer to Saiki in a more comical way compared to the original series. And Saiki, with his unique powers, might react in different and unexpected manners.
In the manga, Saiki doesn't have a romantic ending with Teruhashi. The focus is more on Saiki's supernatural powers and the humorous situations he gets into rather than a traditional romance.
A good Kokomi x Saiki fanfic often has well - developed characters. It should stay true to the original personalities of Kokomi and Saiki while also exploring new aspects of them in the context of their relationship. For example, if Kokomi is usually calm and collected in the original work, the fanfic should maintain that essence while showing how she might act differently around Saiki.
Another theme is the idea of Teruhashi trying to break through Saiki's emotional barriers. Since Saiki is often aloof, Teruhashi's attempts to get closer to him form a major part of many fanfics. It can be really entertaining to read how she tries different strategies to get his attention.
One popular theme is the 'unlikely couple' aspect. Given Saiki's introverted nature and Teruhashi's popularity, the idea of them getting together is an interesting concept. Another theme is the comical misunderstandings. Since Saiki has psychic powers and Teruhashi is always trying to be perfect, there are a lot of opportunities for misunderstandings that lead to humorous situations.
One common theme is the exploration of their unspoken feelings. Since in the original anime there's a lot of unexpressed emotions between them, fanfics often delve into how they might come to terms with their feelings for each other.
You can try looking on fanfiction websites like Archive of Our Own (AO3) or FanFiction.net. These platforms often have a wide variety of fanfics, including ones about Kokomi and Saiki. Just use the search function and type in 'Kokomi x Saiki' to see what pops up.