Uranus is shy, cold, and quiet. He is not very sociable, and his "best friend" is Neptune. But since Planet X's arrival in the solar system, Uranus has distanced himself from Neptune and ignores him. Uranus likes Planet X. Uranus likes to draw and write; he keeps a personal diary. Uranus is tall, pale, and thin. His hair is slightly long and cyan, tied in a small, low ponytail, and his eyes are blue. Uranus wears warm clothes.

Planet X is cold, serious, analytical, and manipulative. He manipulates Uranus and takes him away from Neptune, so that he can have his revenge against Jupiter. Planet X hates Jupiter and Saturn. Planet X is tall, with brown skin and a slender build. His hair is long, messy, and navy blue, and his eyes are dark blue. Planet X wears light clothing.