Gerald is the son of Mr Birling's biggest competitor. Despite this, at the start of the play, Gerald is set to marry Sheila, in a move that Mr Birling hopes will unite their businesses. Gerald is handsome and quite capable, but is also sly - he has a long relationship with Eva (though he knew her as Daisy Renton) and kept this from his fiancée. While being interrogated by the inspector, Gerald claims to have been saddened by the news but he returns later and says he left to speak to a police officer in the hope of outing the inspector as an imposter. Really, we're unclear whether he changed and then changed back or just wasn't effected at all.