Fiona is an internet character that asks for personal information like phone numbers and addresses from children. The document warns kids not to trust or give information to strangers online. It also advises deleting messages that have no name, promise prizes, or contain mean or threatening language, as these could be scams or attacks from characters like Spamazoid or Hothead. The overall message is that kids should avoid giving out private information or responding to suspicious messages, and tell a trusted adult if they receive something concerning online.