According to Touhoumon ~Gensokyo~: A long time ago, Patchouli Knowledge grew tired of Marisa Kirisame coming and stealing her books. Therefore, she made some puppets with decent intelligence and power to keep the library safe. (She doesn't believe in Hong Meiling at all) Unfortunately, one of the manuals had been stolen by Marisa and the thief herself made a lot of puppets for pilfering. When they came, Patchouli impatiently blew both armies of puppets and a part of the library away, included the remaining manuals. After the incident, puppets have been producing with a large amount and people got used to them. Time passes and they are now served like pets to everyone.
- Touhoudex -- it is correct until after 248.