In Overwatch, Mei is a scientist who has taken the fight to preserve the environment into her own hands.
Mei’s blaster unleashes a concentrated, short-range stream of frost that damages, slows, and ultimately freezes enemies in place. Mei can also use her blaster to shoot icicle-like projectiles at medium range.
Mei instantly surrounds herself with a block of thick ice. She heals and ignores damage while encased, but cannot move or use abilities.
Mei generates an enormous ice wall that obstructs lines of sight, stops movement, and blocks attacks.
Mei deploys a weather-modification drone that emits gusts of wind and snow in a wide area. Enemies caught in the blizzard are slowed and take damage; those who linger too long are frozen solid.