Well, it could be really interesting. Maybe it shows a unique interaction between Chara from Storyshift and Sans from Undertale. Their personalities are quite different. Chara can be rather complex and Sans is known for his laid - back yet perceptive nature. So in the fanfiction, there might be a lot of unexpected exchanges and development of their relationship.
Chara is often a popular character. Their complex nature makes them interesting to explore in the context of Storyshift. They can be portrayed in different ways, sometimes more sympathetic than in the original Undertale.
One interesting plot twist could be the role reversal of characters. For example, if a typically heroic character becomes more of an anti - hero or vice versa. It completely changes the dynamics of the story.
One interesting plotline could be a journey of self - discovery for both Chara and Frisk. They might face challenges in the Underground together and through that, their relationship deepens. Another could be a story where they have to overcome misunderstandings. For example, Chara's past actions might be misinterpreted by Frisk at first, but they eventually work it out.
Another plotline could be that there is a rift in the multiverse, and Chara and Sans are brought together to fix it. Along the way, they discover things about each other's universes and themselves, and in the end, they manage to close the rift and return to their respective worlds with a new understanding of the multiverse.
It often starts with curiosity. They meet in the Underground and are intrigued by each other. As they spend more time together, they start to trust one another. For example, Frisk might show Chara the power of kindness, and Chara might show Frisk some of the secrets of the Underground.
To draw a cartoon of 'Poseidon' name, think about giving the letters a wavy or curvy shape to represent the ocean. Add some stars or bubbles for decoration. Maybe draw a little crown on top of the 'P' to show Poseidon's power.