The image is a “wallet/storage tool” that is necessary for moving NFTs and FTs (e.g., crypto assets) in and out of the game and carrying them around.
By connecting to the game, the corresponding NFTs and FTs can be sent to the game for use, and “characters and items in the game that can be converted to NFTs” and “FTs” can be sent to the wallet for storage and operation in an environment separate from the game.