in tests/basics.csv the string example "yes mani !" is encoded with "🚀🏃✋🌈😅🌷🤤😻🌟😅👏"

The rocket at the beginning corresponds to a null byte. Why is it here? I thought a leading null byte marked the identity encoding. Does this mean the base256emoji encoding also implies an identity encoding, like is it its default textual representation or something? In that case it would mean all base256emoji strings start with a rocket, right?