Messaging including standard and custom characters

Embodiments of the present technology enable messages including both standard and custom characters to be communicated between client devices. Each of the standard character(s) is included within a Unicode Standard that is supported by an operating system of a client device. By contrast, each of the custom character(s) is not included within the Unicode Standard. Such embodiments enable users to create their own custom characters, such as custom emoji, or utilize custom characters created others. Beneficially, embodiments described herein overcome many of the drawbacks associated with electronic messages being limited to including only standard characters, such as standard emoji.