Well, Tamil true ghost stories have their own charm in terms of scariness. They often involve local superstitions and beliefs which can be quite terrifying. However, other regional ghost stories also have their own scary aspects. For example, some Western ghost stories might rely on jump scares and a different kind of horror atmosphere. But Tamil stories can be scarier for those who are more familiar with the Tamil cultural context and the sense of the unknown it presents. The descriptions of the ghosts and their actions in Tamil stories can be very vivid and disturbing.
I don't have definite information. It could be loosely based on some real incidents, but it's likely to have been heavily fictionalized to make it more engaging for the audience.
Not entirely. While the movie might have drawn inspiration from real events, it has undergone significant fictionalization and creative interpretation to make it more engaging for the audience.