Well, in Japanese, the term for 'novel' is 小説 (shousetsu). It's a very common word you'll come across when dealing with Japanese literature. There are many famous Japanese novels, like 'Norwegian Wood' by Haruki Murakami, and in Japanese, it would be referred to using this word 小説.
Not really. Firebird is mostly a fictional creation with elements that might draw inspiration from various sources but not a direct retelling of a true event.
Firebird isn't a true story. It's more of an imaginative work, perhaps with elements that are common in fictional tales but not tied to real-life happenings.
The common Japanese phrase for 'fictional character' is '鍓典綔涓娿伄浜虹墿' (s艒saku-j艒 no jinbutsu). It implies a character that is invented or imagined rather than based on a real person.
The Japanese expression for visual novels is '銉撱偢銉ャ偄銉儙銉欍儷'. It has become a recognized term within the Japanese entertainment and literary landscape when discussing this particular genre.
I'm not sure specifically what 'firebird graphic novel' is about as there could be many with that name. It might be about a character named Firebird who has various adventures, perhaps in a fantasy or science - fiction setting.
Well, without more context, it's difficult to say exactly what the 'firebird true story' is about. It might be a story of a scientific discovery related to a bird species that has some 'fire - like' characteristics, such as bright plumage that looks like fire. Or it could be a personal account of someone who had a spiritual experience associated with the concept of a firebird.