The first time Pepper Potts met Tony Stark, they were both appearing on a television program as opponents. Pepper dedicated her life to a worldwide disarmament campaign and was a very vocal and famous protester of Stark International.
However, after the Mandarin’s attack on the Stark International building and Tony Stark’s determination to change the focus of the company to using technology to help, Pepper Potts was hired to help in the rebrand. She informed Tony and the company of many problems in the world which could be solved with Stark technology. It was because of her that the Rescue Suits were created, half way between a suit of armour and an ambulance. The Rescue Suits could get advanced medical technology to trapped individuals very quickly with it’s added strength, speed and defence. It proved incredibly useful during earthquakes and terrorist attacks.
However, when Pepper began to develop feelings for Tony Stark and he the same, she requested that she be given a personalised Rescue Suit that could repair his own Iron Suit. Her Rescue Suit has an added Arc Reactor to reboot Tony’s suit if it ever fails. She also had many other features personalised to help and ‘rescue’ other Avengers.
Her suit does have weapons but all are purely defensive, such as repelling force fields and cutting lasers.
It was working side by side on the field that made her and Tony fall in love.