Your Hearthling occasionally does something more times than necessary, feeding the sheep twice, making extra tools, mines extra blocks, the works.
Spirit boost, but occasionally wanders instead of doing work.
If able, will do work close to or inside a building.
Increased body and decreased chance to run away in combat, but when in a group causes allies to be more likely to run.
Increases nearby Hearthlings’ morale in and out of combat.
Will prioritize moving stuff to storage areas much higher than normal.