I'm sorry, I haven't heard of Kura Rajanna specifically. There could be many people with this name. Maybe it's a local figure in a particular region. Without more context, it's difficult to tell the real story.
I really don't know much about Kura Rajanna's real story. It could be that he is a relatively unknown figure outside of a certain area or group. There's not enough information to say much at this point.
Well, Spy x Family fanfiction can be really interesting. Some fanfictions might explore different relationships between the characters in more depth. For example, they could focus on the bond between Anya and Loid in a new situation that wasn't shown in the original manga or anime. It's also fun to see how authors play with the spy and assassin themes in unique ways.
Spy x Family manga has wrapped up. It provided a conclusive and fulfilling storyline that wrapped up all the loose ends. Now you can binge-read the entire series without any interruptions.