Roger Holzberg (born 1954) is an American health innovator, creative director, and inventor.
 He is the co-founder and creative director for Reimagine Well, as well as the founder of the organization My Bridge 4 Life.
 He also previously served as the Creative Director (consulting) for the National Cancer Institute.
 Through My Bridge 4 Life, Holzberg provides a wellness network for people facing health crises.
 Holzberg was for twelve years a Vice President / Creative Director at The Walt Disney Company, both at Walt Disney Parks and Resorts Online and at Walt Disney Imagineering, until he left to found My Bridge 4 Life in 2008.
Martin A. "Marty" Sklar (February 6, 1934 – July 27, 2017) was The Walt Disney Company's International Ambassador for Walt Disney Imagineering, the subsidiary of the company which designs and constructs Disney theme parks and resorts across the world.
 He was formerly Vice President of Concepts and Planning for the company, before being promoted to President, then Vice Chairman and Principal Creative Executive before his final role.
 Disney honored him with a Disneyland window dedication ceremony on his date of retirement, July 17, 2009.
Thierry Jean-Andre Coup is the current Senior Vice President of Universal Creative, Universal Parks & Resorts' research and development division.
 Coup began his career working in the film industry, performing set design and visual effects.
 He moved into theme park design in the early 1990s when Walt Disney Parks and Resorts offered him a position with Walt Disney Imagineering.
 In the late 1990s he transferred over to Universal Creative and worked on projects such as The Amazing Adventures of Spider-Man, Harry Potter and the Forbidden Journey and .
John Alan Lasseter (born January 12, 1957) is an American animator, film director, screenwriter, and film producer.
 He currently is the chief creative officer of Pixar Animation Studios, Walt Disney Animation Studios, and DisneyToon Studios.
 He is also the Principal Creative Advisor for Walt Disney Imagineering.
A113 (sometimes A-113 or A1-13) is an inside joke, an Easter egg in media created by alumni of California Institute of the Arts, referring to the classroom used by graphic design and character animation students including John Lasseter, Tim Burton and Brad Bird.
 Bird first used it for a license plate number in the "Family Dog" episode of "Amazing Stories".
 It has appeared in other Disney movies and every Pixar movie.
Walt Disney Creative Entertainment is the theatrical live entertainment production division of Walt Disney Imagineering, the design and development arm of Walt Disney Parks and Resorts, a segment and direct subsidiary of The Walt Disney Company.
Tokyo Disneyland (東京ディズニーランド , Tōkyō Dizunīrando ) is a 115 acre theme park at the Tokyo Disney Resort in Urayasu, Chiba, Japan, near Tokyo.
 Its main gate is directly adjacent to both Maihama Station and Tokyo Disneyland Station.
 It was the first Disney park to be built outside the United States, and it opened on 15 April 1983.
 The park was constructed by Walt Disney Imagineering in the same style as Disneyland in California and Magic Kingdom in Florida.
 It is owned by The Oriental Land Company, which licenses the theme from The Walt Disney Company.
 Tokyo Disneyland and its companion park, Tokyo DisneySea, are the only Disney parks not wholly or partly owned by the Walt Disney Company (however, Disney has creative control).
Walt Disney Imagineering Research & Development, Inc. is the research and development arm of The Walt Disney Company, responsible for the creation, design, and construction of Disney theme parks and attractions worldwide.
 Founded by Walt Disney to oversee the production of Disneyland, it was originally known as Walt Disney, Inc. then WED Enterprises, from the initials meaning "Walter Elias Disney", the company co-founder's full name.
Jason Surrell is a former show writer and producer for Walt Disney Imagineering, the division of The Walt Disney Company that designs and builds for Disney's theme parks and resort hotels.
 Surrell also is a show director for Walt Disney Entertainment.
 In June 2014, Surrell left Walt Disney Imagineering and is now with Universal Creative.
The Red Cross with Imperial portraits egg (or the Imperial Red Cross Easter Egg) is a jewelled and enameled Easter egg made by Henrik Wigström (1862–1923) under the supervision of the Russian jeweller Peter Carl Fabergé in 1915, for Nicholas II of Russia, who presented the egg to his mother, the Dowager Empress Maria Feodorovna, in the same year.

Question: Who was the Principal Creative Advisor for Walt Disney Imagineering who helped design the A113 Easter Egg in media?
Answer: John Lasseter