A 'historia visual novel' could be about various things. It might be a story set in a historical context, with characters and plots that unfold in a way typical of visual novels. It could focus on a particular era, like the Renaissance or the Victorian age, and tell a fictional story with elements of that time's culture, society, and events.
The Emperor of Light was a character that Shue Shigawa had taken on in the novel " Shigawa." He was the leader of the orcs and created his own regime. He was also known as the Light King. In the battle against Demon God Emperor Carter, Shue Nisagawa had successfully defeated the Demon Race and became the Demon Emperor. Other than that, there were also some search results that mentioned that Hideyoshi became the Demon God Emperor and the Radiant King of the Far East, becoming the chief of the Purple River. However, the specific details and background information about Shin Shikawa becoming the Radiant Emperor were not found in the search results provided. Therefore, there was no way to know the identity and background of the Radiant Emperor.
Yes, there are quite a few. You can start by looking on fanfiction.net or Archive of Our Own. Some fanfictions might explore their relationship in an AU (alternate universe) setting, like a modern-day scenario where they meet and get married, while others could be more in line with the original story's themes and settings but with a different plot twist leading to their marriage.
There could be some, but it really depends on the market and the fan base. Since visual novels are a diverse genre, those with a historical focus might not always get the same level of mainstream attention. But in the communities dedicated to visual novels and historical fiction, there may be some well - known 'historia visual novel' titles that are highly regarded for their storytelling, art, and historical accuracy.
One common theme is the exploration of a new world order. Since Eren and Historia are both important characters, their marriage could signify a change in the power dynamics of their world. Another theme is the growth of their relationship, from initial attraction to a deep, committed love. And often, there's the theme of facing challenges together, whether it's from outside forces or internal conflicts within their relationship.
Historia in 'Attack on Titan' is significant as she represents the hidden secrets and power struggles within the walls. Her character development is a key part of the story's exploration of the society. Eren, being the main protagonist, is the one who initiates a lot of the action. His character embodies the themes of freedom and the will to fight against oppression. Together, they add different dimensions to the story. Historia's story arc is intertwined with Eren's, and their combined presence enriches the narrative.