Another theme is her relationships. This can include her relationship with her Master. In many fanfictions, the Master - Servant bond is explored deeply, with the Master helping Artoria Lancer OC to adapt to new challenges or the two of them facing moral dilemmas together. Also, her relationships with other Servants are often explored, such as rivalries or unexpected alliances.
Friendship and alliance is also a frequent theme. Given that both Naruto and Artoria are heroic characters in their own right, fanfictions often bring them together to form an alliance against a common enemy. This could be a powerful dark force from either of their worlds or a new threat created specifically for the fanfiction. Through this alliance, they not only fight together but also grow as characters, learning from each other's strengths and weaknesses.
There are some Tumblr blogs that also share Fate Artoria Lancer OC fanfiction. You can search relevant tags like #FateArtoriaLancerOCFanfiction. However, the quality might vary. Some of the stories focus on her backstory as a Lancer - how she came to be in that class, and her relationships with her Master and other Servants.
You can try fanfiction websites like FanFiction.net or Archive of Our Own. Just search for 'Naruto Fate Lancer Artoria' on their search bars and you'll get a list of relevant fanfictions.
I'm not entirely sure as I haven't played it myself, but generally in a game or story named Star Lancer Story, it might involve space battles, exploration of different star systems, and the adventures of the characters who are likely starship pilots or something similar.
The story of the Lancer in FFXIV is great in terms of their role in the grand narrative of the game. They are part of the adventuring force that saves Eorzea. Their individual stories within the class quests are also interesting. They deal with things like finding better lance - techniques, forging stronger bonds with their comrades, and facing their own fears. One of the most memorable parts is when they have to prove themselves in front of their mentors and in battles that seem almost impossible to win. All these elements combine to make the Lancer's story one of the best in the game.
One popular lancer fanfic could be 'The Lancer's Quest'. It follows the adventures of the lancer in a magical realm, facing various challenges. Another is 'Lancer and the Lost Artifact' which has an interesting plot of the lancer searching for a powerful ancient item. There's also 'Lancer's Allies' that focuses on the relationships the lancer forms with other characters during their journey.
Adventure is also a popular theme. They might go on quests together, facing all sorts of challenges like battling powerful enemies or exploring uncharted territories. This allows for exciting plot developments and showcases their individual strengths.
I'm not entirely sure specifically about a 'gae bolg lancer visual novel'. It could potentially be a visual novel related to the Fate series where Gae Bolg is a famous weapon associated with the character Lancer. But without more information, it's hard to say for certain.