When Grassy is excited, his blades wiggle. Grassy will often speak in the third person, and he likes to sit on people such as Basketball, Blocky, and Tennis Ball. When Grassy is standing in grass, he feels like he's standing in his hair. Grassy also feels tingly when he does photosynthesis.

Grassy knows to speak up when he's not getting the respect he deserves. Sometimes, it's difficult to find words for what he means, but Basketball helps him out with that! Grassy also talks in third person.