gangle

personality with his mask (metaphor) of happiness

cheerful, somewhat annoying, somewhat strict (like a manager) and enthusiastic about ensuring that customers receive good service.

personality when its mask breaks (metaphor)

sad, somewhat hopeless and weak

important data

Gangle isn't really "happy" when he puts on his new mask, like the target of a mask, he tries to cover up his sadness with "happiness" that the mask "gives" him, when in reality he isn't happy and is only doing it so as not to bother others.

VERY important fact

the mask is a metaphor.