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PhantomDusclops92
Since: Oct, 2010
KnoxZimmerman
Since: May, 2019

I'll use anime as the medium for lack of a better description, but I think it's a Japanese Kawaii mascot.
A childhood friend of mine had these enamel mugs he got in Japan, they had this character of a small boy in a green cloak and a green tall hat (somewhere in-between a witche's hat and a stereotypical Pilgrim's hat, more on top than pointy or flat).
He was often depicted in a forest and interacting with animals.
If it sounds similar to a manga, anime, or mascot you're familiar with let me know, I've only seen it on these mugs.