Yuki Tsunoda is a true character. Anyone who sees the Japanese driver walking through the paddock, barely 1.59 metres tall, quickly characterises him as a shy little man. But as soon as Yuki climbs in his car and finds something he doesn't like, he opens his mouth with a mixed bag of swearing and rants. Therapies to control his temper have had some effect in recent years, but Yuki remains Yuki.