Prompto has extremely low self-esteem. He thinks he's ugly, skinny and stupid. Gladio thinks the exact opposite of him and thinks he's gorgeous, toned, and extremely kind and smart. When Gladio calls Prompto beautiful one night, Prompto breaks down in tears and denies it. Gladio is shocked at how extreme Prompto's poor self image is. He makes it his goal to show Prompto how beautiful he thinks he is. Over the course of their journey, Prompto slowly starts to believe his lover.