Yoko Tsuno is an electrical engineer, who was raised in Japan but now lives in Belgium. She is quite compassionate and has a knack for making friends. Yoko is also a skilled scuba diver, holds a black belt in aikido, and can pilot both gliders and helicopters. This wide range of competences, together with her near-flawless behaviour, makes Yoko fall into the classic category of a competent woman. The flaw she does admit to having is the typically Japanese trait of valuing personal honour above monetary wealth, which leads her at times to be trusting to the point of blindness.
Yoko first appeared in Belgium in 1970 in a number of different comics, so that her adventures are now collected into 25 volumes, 4 of which have been translated into English so far.