Sure. 'Stella Vermillion' light novels are quite popular. You can start with the main series which usually features Stella in various adventures. Check out local bookstores or online platforms like Amazon for a wide selection.
The light novel 'No Game No Life' can be considered similar. It has a unique world - building where games decide everything. The characters are intelligent and have to strategize, just like in the Stella Vermillion one. It also has an interesting plot with many twists and turns.
Well, often there's a theme of discovery. The OC discovers Mavis's past or secrets of the Fairy Tail world through their interactions. And of course, love is a big theme. The relationship between the OC and Mavis can be a slow - burn romance or a more immediate attraction. There can also be themes related to power and magic, like the OC learning magic from Mavis or them combining their powers to face a threat.
A common theme is friendship. Many fanfictions focus on how Red and Stella become friends and how that friendship enriches their lives. For example, they might share a common goal and work together towards it, strengthening their bond in the process.
One common theme is love and romance. Since they are a couple, most fanfictions explore their relationship in different ways, like how they fall in love or keep their love alive.
Since I'm not well - versed in Stella x Tsuribari fanfic specifically, it's hard to say for sure. But in general, themes like friendship, adventure, and self - discovery could be common. Maybe there are also themes related to the unique relationship between Stella and Tsuribari.