The reply by the author suggests this contains other artists' characters.

• The chameleon-tailed girl is Cecile
• The blonde one with cat ears can be found in post #3665042, belonging to reze (rewindze)/@RewindzeVII [EDIT] Her name is Rufaro.
• The harpy can be found in post #6280368

But I cannot identify the hand. That character supposedly belongs to bleuzer/@darkromanov