To start off, when Diamond first saw Platinum he thought she was stunning, enough to be a princess. He then began fondly referring to her as missy or lady very early on. Diamond serves as Platinum's unofficial bodyguard in the way that he constantly protects her and urges her to be careful, sometimes putting himself in danger by doing so. He also helps her out with contests and gym battles by baking her poffins and lending her his Pokémon. Platinum always giggles (and occasionally denies doing so) at Dia's jokes and enjoys having him around.