While Yoda may not be the main character in the Skywalker Saga, he's still one of the most recognizable characters in Star Wars. When he first appeared in The Empire Strikes Back, he was a bit off-putting. His small stature and odd way of speaking weren't what Luke (or fans) expected from a legendary Jedi. Yet, he went on to make his mark on the fandom -- especially during the Prequels -- when he went toe-to-toe with Darth Sidious.
Source:https://www.cbr.com/star-wars-yaddle-disappeared-count-dooku-theory/