While deprived of his memories, Weather was mellow and eccentric. He would boldly stand a few inches next to Jolyne's face to get her attention rather than call her name and usually walks on his toes. He was trustworthy and compassionate, rescuing those in need without caring for his own safety. Unless someone he knew was in danger, Weather hardly panicked. Weather was also described as having a strong sense of justice, describing the worst injustice as "evil that does not know it is evil".

Upon the return of his memories, he reveals his sinister colors. While still retaining his previous passion for his friends, he is not afraid to flaunt his powers for his own amusement. Weather smiles when he shocks unsuspecting victims or even skips in joy amongst his hazardous rainbows, his newer personality frightening even Anasui. His melancholy over his memories soon consumes him and drives him to settle things with his twin brother.