Zero is Radarr's daughter and Sonar and Echo's brother. He has white fur with a spiky head tuft and brown eyes. His weapon is a small knife.
Zero is shown to be brave, bold, caring, and fierce. He does like to hang out with Pramesh a lot. Zero is also shown to be nurturing and caring when his friends or siblings are sad.
Zero is close to his sister Sonar and is seen being a battle buddy for her. He is also seen protecting her from several threats. After realizing Webster was dead, Zero wraps his tail around her trembling and crying sister.
Zero seems to be distant but protective of his friends and family members.
He also seems to have a huge likeness towards the Absolute Zeroes.
Trivia:
Zero was named after the Absolute Zeroes due to his resemblance their atmosphere.
It appears Zero is the same age as Sonar or slightly older.