Dio Brando is an important and iconic antagonist. His complex relationship with the Joestar family, his thirst for power, and his own vampiric abilities make him a central figure in the visual novel's story.
One unique feature is its distinct art style which is very recognizable and adds to the overall charm of the visual novel. It often has flamboyant character designs.
Well, it could have more intense action scenes, deeper character revelations, or perhaps a shift in the story's direction. But you'll have to read it to find out for sure!
In many cases, OVA anime aren't a core part of the manga. They can offer supplementary content or alternate perspectives, but they don't typically influence the main manga storyline.
Sure, JoJo Part 7 manga is available in English. But the availability might vary depending on where you look. Some physical bookstores or online platforms might have it in stock.