SixthLeafClover has a patreon, with comics and cute stuff (and also some NSFW stuff), but she has a special reward for long-term members annually. Digital sketches! Here she drew Cinnamon, my Na'vi-inspired Pandora native character.

Character Cinnamon (c) Rooth, others (c) their owners
Artwork (c) SixthLeafClover
Original post: Patreon!
Rooth's characters described here: http://refs.rooth.org/