What is the pseudonym of Sharron Davies in Gladiators?

Her Gladiator pseudonym is "AMAZON".

Amazon is a former Olympic and Commonwealth swimming champion. She has more than 200 British swimming records to her name and was awarded an MBE. She also won two gold medals at the Commonwealth Games in 1978 and in 1992 she broke her own 12 year old British 400 metre individual medley record.

On retiring from competitive swimming, she went on to present junior Gladiators show Train 2 Win but then her role changed when producers realised she would be a perfect Gladiator and suggested she tried-out, needless to say she passed with flying colours.

http://www.gladiatorszone.co.uk/gladiators/female/amazon/

Olympic and Commonwealth swimmer who has had a varied media career. This includes playing Amazon, a Gladiator until an injury forced her to withdraw, and an unsuccessful stint at co-presenting the demanding Channel 4 morning show The Big Breakfast. Currently, she presents swimming coverage for the BBC.
http://www.ukgameshows.com/page/index.php?title=Sharron_Davies