I'm not sure, but perhaps it has a unique atmosphere. It might be set in a particular location that adds to the spookiness, like an old mansion or a dark forest.
I can't give you a definite answer on Momoko's age. Maybe you could check the original source of the ghost stories or related discussions for that information.
Well, a variant edition comic is kind of like a unique take on a normal comic. It might have a limited print run, or it could showcase a different artist's interpretation of the cover or have some exclusive content inside. These are often sought after by collectors.
It depends. Some people might think so if they don't have much interest or if the variants don't offer significant value. But for collectors or hardcore fans, they can be quite valuable.
No, the novel coronavirus isn't always the delta variant. There are many other variants circulating as well. Factors like geographical location and the specific outbreak can influence which variant is predominant in a given area.
A variant comic book is a special edition of a regular comic that has some differences, like a different cover, color scheme, or maybe some bonus content.
You can also check the comic's indicia or publisher's notes. Sometimes, they'll explicitly mention if it's a variant. Another thing to look for is unique numbering or special markings on the comic.