Theo Paphitis is the Dragon associated with the stationery retailer Ryman.
Paphitis acquired Ryman, the British stationery chain, in 1995. The retailer became one of the best-known businesses in his portfolio and is central to his public identity as an entrepreneur. Ryman sells stationery, office supplies and related products through shops and online channels.
Paphitis joined Dragons' Den as an investor and became particularly associated with retail and consumer businesses. That association can cause confusion because several Dragons have invested in retail brands, including Peter Jones and Deborah Meaden.
The name Ryman also has a longer history before Paphitis's ownership. The chain was founded in London in 1893 by Henry Ryman, so Paphitis acquired the established retailer rather than creating it from scratch. The question asks for the Dragon linked to ownership and business leadership.