The old man in the story is Manager of Video Shop Gokuraku, Japan Branch. His real name is unknown. Despite the term 'Manager', he belongs to the lower echelon of the Gokuraku and basically manages the 'rental system' in the video shop. He has some specialized knowledge in the field of Video Girl Engineering and helps him employer, Rolex, in development and maintenance of equipment. In the series, he is the only 'normal human' employee working for Gokuraku. (Source: Video Girl Ai Manga and Anime Resources)
Leonof the Puppet-Master is an elderly man who controls a large number of puppets with an elaborate system of strings. He can manipulate them to look like real people, and uses them to do horrible things to people close to Vash. His real name is Emilio, having known Vash during his childhood. His love interest dies sometime after, and he goes into puppet making to mend his broken spirit. (Source: Wikipedia)
The Great Toad Sage is the oldest and most respected toad of all the inhabitants of Mount My�boku. Because of his age, the other toads affectionately call him Great Honorable Geezer. He is famed for his highly accurate prophecies. Being several thousand years old, he is the oldest and most respected among the population of Mount My�boku. At his great age, the Great Toad Sage seems to constantly smile and tends to have his eyes closed or squinting. He is portrayed and described as being senile, and sometimes out of touch with his present situation, so he does tend to forget things easily and quite quickly. However, when reminded, he is still able to remember things and can easily tell things very precisely. As a sage, he is also very wise, and is quick to stop Shima and Fukasaku from bickering and encourages harmony. It would seem that unlike most other toads, he actually has respect for Jiraiya, and has urged both Shima and Fukasaku to cooperate with him
A man who owns a yakitori stand who, in actuality, works for Kurusu.