This is the logo for Elsa (Emacs Lisp Static Analyser) which is a tool that analyses your code without loading or running it. It can track types and provide helpful hints when things don't match up before you even try to run the code.
Elsa logo by Nasser Alshammari is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
Based on a work at https://github.com/nashamri/elsa-logo.