Zack Kelvin

Zack Kelvin is a friend to Phil, Smiley, and Phred. As his last name is Kelvin, he is usually depicted in a state of extreme temperatures.

Characteristics
Zack's redeeming feature in the majority of the series was how constantly cold he was. This coldness can also cause freezing to his body after shock, as noted in AS2.

In the end of AS5, however, the molecules in his body causing him to be so cold were drained by the human leader Viz to be used in powering up a giant ice laser beam aimed at planet Earth. After the beam was used, Zack's new lack of low-temperature molecules led him only to have a very high temperature instead, to the point of spontaneous combustion.

In Animal Transfer it is proved his last name is Kelvin, his favorite colour is red (his father's favourite colour too), he hates dodge ball, he never ties his shoes, polar bears creep him out, and sneezes when he sniffs pixie dusts because he is allergic to them. He also completely catches on fire when he sneezes and is given the title '"Caribou Fireplace" later in the series.

Relationships
Zack is friends with Phred, Smiley and Phil throughout the series, but only in the Animal School 5 and Animal Transfer he was notably friends with them, but he proved that he just knew all three of them in the first.

Trivia

 * Zack was originally going to be an arctic fox, this was changed due to his species and my idea.