Theo Paphitis is the Dragons' Den investor associated with the stationery retailer Ryman.
Paphitis acquired Ryman, a British stationery chain, in 1995. He later expanded his retail interests through other businesses, including lingerie retailer La Senza and the craft chain Boux Avenue. His commercial background made retail, branding and customer-facing businesses recurring areas of interest on Dragons' Den.
Paphitis became a dragon in the British version of the programme and was recognised for a practical, commercially focused style. Entrepreneurs often sought his advice on distribution, shops and brand development as well as funding.
Ryman is sometimes confused with the other companies linked to the panel. Peter Jones is associated with Phones International Group and Duncan Bannatyne with his health-club and hotel group. Paphitis's retail portfolio is therefore the key clue to this answer.