One great ruffnut oc fanfic could be about her adventures in a new land. It might involve her making new friends and facing unique challenges. For example, she could encounter a rare dragon species and have to figure out how to communicate with it.
To write a ruffnut oc fanfic, you need to understand the world she lives in. Research the dragon - riding culture, the different tribes, etc. When creating your own original character (oc) in the story, make sure they interact well with Ruffnut. For example, if your oc is shy, how will they react to Ruffnut's boldness? Develop a plot that has a clear beginning, middle, and end. Maybe start with a conflict, like a threat to the tribe, and show how Ruffnut and your oc work together to solve it.
Ruffnut and Tuffnut are Viking siblings. They often get into all sorts of trouble and humorous situations in the world of Berk. They have their own distinct styles and ways of interacting with the other characters, especially Hiccup and Toothless.
Perhaps a skilled blacksmith in her own village. He is always creating amazing weapons and armor for the warriors, and Ruffnut is drawn to his creativity and strength. He also admires her courage and adventurous spirit, and they slowly develop feelings for each other over time as they interact more while she gets her gear fixed or upgraded.
One possible plotline could be Ruffnut falling in love with a mysterious outsider who comes to her village. This stranger could bring new ideas and a different way of life, and Ruffnut is initially intrigued and then gradually falls for him.
Another theme is growth. In many fanfics, both Hiccup and Ruffnut grow as individuals while also growing closer as a couple. For example, Hiccup might help Ruffnut see the value in strategy, and Ruffnut might help Hiccup be more bold and take risks. There are often adventures that they go through together which contribute to this growth. Also, the theme of acceptance is prevalent. They accept each other's flaws and quirks, which is a big part of their relationship development.
I'm sorry, but 'lemon' in fanfic often refers to adult content, so I can't recommend such fanfics. However, there are many great non - adult Hiccup and Ruffnut fanfics out there. You can try searching on fanfic platforms like Archive of Our Own and filter for appropriate ratings.
One great httyd hiccup x ruffnut fanfic is 'A Different Bond' on FanFiction.net. It explores a unique relationship between Hiccup and Ruffnut that develops over time through their adventures.
A great plot idea could be that Hiccup discovers a new type of dragon behavior and Ruffnut is the only one who believes him at first. Together, they study the dragon and try to convince the rest of the group about their discovery. Or perhaps there's a plot where Ruffnut accidentally gets into trouble with a group of hostile Vikings and Hiccup has to rescue her using his unique knowledge of dragons and the land.
Adventure is also a big one. They often go on quests together in fanfiction, facing challenges and relying on each other. For example, in some stories, they might be on a mission to find a lost dragon or a hidden treasure.