About Nekochan emoji 
Nekochan emojis used in sphinx-nekochan extension were created and distributed by shikamatsu-san.
The author of the extension, takanory, has included emojis in the extension with permission from shimamatsu-san (Thank you 
).
The original Nekochan emojis are distributed in the following page. Please use Nekochan emojis on Slack and Discord.
https://note.com/shikamatsu/n/nd217dc0617db (Japanese)
In addition, if you use LINE, there are Nekochan stickers and emojis. Please use these as well.