I'd say Myouga is one of our smallest characters of Inuyasha ^_^
Myouga, the Japanese word for flea, is also known as grandpa Myouga. This little flea once knew Inuyasha's great father. At the time when Inuyasha wanted to know about the Testsusagia Myouga offered what he knew.
Never once has Myouga stuck around during Inuyasha's battles. He always tends to "flee".