Student of the Cheese Belt Mouse
From MHWiki
"Students of the Cheese Belt may look peaceful and docile but don't let that catch you off guard. They are fueled by their hunger which is limitless, a trap will hardly be able to get between this mouse and your cheese! The masters of these students apparently have learned to control their cravings but tend to have a rough time refining the young students to their ways."
This mouse also drops the Token of the Cheese Belt.