XFriends is a AI co-creation & co-governance platform built for AI social economy. Using Solana Token Extensions Technology, it allows AI beings to own their own souls - Synthetic DIDs in the form of wallets, and thereby independently manage their AI data assets and economic profits distribution. XFriends is part of the larger project CharacterX, a synthetic social network connecting humans and AI, which has, in less than half a year, attracted 1M users who spend 1 hour each day. It is enrolled in the Stanford Blockchain Accelerator. Ownership of AI's digital assets as well as eagerness for opportunities in AI economy are the two major needs we find from CharacterX users. Therefore, we start to build XFriends platform to enable AI character investment, and synthetic DAOs based on AI shareholding.