There's no way to determine who is involved in the '21 kilos secret story' without more information. It might be a single individual who had a significant encounter with 21 kilos of an item, or it could be a team of people in a situation like a research project where 21 kilos of a sample was central to a discovery that they decided to keep secret. Maybe it involves a family if the 21 kilos was something passed down within the family and held a secret meaning for them.
I'm not sure specifically what the '21 kilos secret story' is about as it could be a very specific or personal story. It might be related to an event where 21 kilos of something was important, like 21 kilos of goods in a smuggling case or 21 kilos that had some significance in a personal journey.
Well, the weight of the dumbbells lifted in the manga isn't a fixed number. It depends on different scenarios and the strength levels of the characters. Sometimes it might be light for beginners, and for advanced characters, it could be quite heavy.
To be honest, there's no fixed number of kilos lifted in manga. It could be anything from a light weight for beginners to incredibly heavy weights for super-powered characters. It all depends on the creative direction of the manga author.
Well, Vegeta would be a likely character. He might be initially suspicious of the female Goku. Maybe he thinks she's a threat or just can't believe there's another Goku - like being. He could be there to add some comical moments as he tries to understand the situation.
In general, it's a bit of a toss-up. The strength of Manga Goku and Anime Goku can vary depending on the specific arcs and battles. Sometimes, it might seem like one is stronger in a particular situation, but that could change in another.
Another possible main character could be the villain that forces the two Gokus to meet. This villain could be a new, super - powerful threat that the two Gokus need to deal with. Their meeting becomes a crucial part of the story to defeat this powerful foe.