Systems and methods for providing multi-source based knowledge data for Artificial Intelligence (AI) characters are provided. An example method includes providing a plurality of data sources; receiving, from a user, at least one word during a conversation between the user and an AI character; ascertaining a speech style of the AI character; analyzing the at least one word to determine a type of information needed to generate a reply to the user; selecting, based on the type of information, at least one data source from the plurality of data sources; generating, based on the at least one word, one or more queries; sending the one or more queries to the at least one data source; receiving one or more responses from the at least one data source; forming, based on the one or more responses and the speech style of the AI character, the reply for providing to the user.