He has a bit of a short temper, but he's trying his best to keep it under control lately. He is a tsundere. He truly views Lord Hater as his liege. However, they bicker occasionally, though they sometimes get along quite well. He struggles to investigate and fix things whenever Hater ruins a plan. He is on the shorter side. He denies being cute. He wants to be recognized but isn't good at expressing it. He hates Wander and Sylvia. Peepers' army all look similar to him (e.g., the Watchdogs; they look identical except for their helmets). As a side note, he is surprisingly muscular.

One of the villainous warlords seeking to conquer the universe, he takes the form of a skeleton. He is a massive narcissist, calling himself the "Greatest in the Galaxy" and the "Superstar of the Universe." Hater. He harbors the ambition to become the ruler and No. 1 of the universe, but Wander always ruins his plans. His personality is hot-tempered and immature, yet he is a tsundere. He has his subordinates and the Watchdog army. He has obsessive-compulsive tendencies. His abilities include strength that transcends imagination, levitation, and the power to blast green lightning from his hands.

His defining features are a long green hat with a black band and a star, and he is an orange creature covered in orange fur. He is over 2,000 years old, possesses a perpetually positive personality, and loves helping others. He has obsessive-compulsive tendencies. He considers Hater to be his friend.

She is a Zbornak. A blue horse-like creature and Wander's best friend. She is a tough, hot-tempered warrior who is excellent at fighting, taking on the role of Wander's bodyguard. On the other hand, contrary to her appearance, she has a surprisingly kind heart, occasionally shedding tears or showing a sense of responsibility for alien life forms. She is a tsundere.