Rob Law created the Trunki ride-on suitcase featured on Dragon's Den.
Law developed Trunki as children's luggage that could also be ridden, addressing the practical problem of keeping young travellers engaged while moving through airports and other journeys. The product's hard-shell body, wheels and handle give it its characteristic ride-on design.
The Trunki appearance is frequently remembered as a Dragon's Den rejection story. The lack of a deal did not prevent the product from becoming successful, illustrating that a television investment decision is not the same thing as a final verdict on a product's commercial potential.
Rob Law is the specific answer because he is the designer and entrepreneur connected to Trunki. The dragons, the presenter and the later retail partners are separate roles. The question asks for the creator, not the programme's host or an investor who commented on the pitch.