subzero [suhb-zeer-oh]
adjective
1. Indicating or relating lower than zero on a scale, especially on the Fahrenheit scale.
2. Characterized or appropriate for subzero temperatures.
EX. It makes a lot of sense that Mario would be Subzero (since Subzero has a brother too) and Subzero & Scorpion are the two main characters of the franchise (despite the movies casting them as villains or ancillary characters).