Here’s Snowball. He is a mutant who is composed out of snow. He and Psych were best friends and the jokers of the team. Snowball died when a villain activated his self destruct device. The base was nuclear powered and it was about to meltdown. Gadget could stop it, but the rods were too hot. Snowball jumped onto the rods, killing himself, but cooling them enough to stop the melt down. His death would change the Cadets, fracturing them.