Jaidora is a former member of The Doraemons from their early days in the Robot Academy. He wears thick glasses and unable to see anything without them. He has the habit of sticking his tongue out.

Normally he was bashful and timid. Whenever he's in panic, he runs in circles frantically with steam coming out of his hat, and his tongue that slides so rapidly that it makes afterimages.

(Source: Doraemon Wiki)