Happy

ハッピー

Happy is a blue, anthropomorphic cat alien from the planet Exceed, modeled after the character of the same name from Hiro Mashima's Fairy Tail series.
During Rebecca's childhood, he dies in a roadside accident and is revived in a mechanical body constructed by Professor Weisz. Serving as Rebecca's companion, he can reconfigure his body into a pair of rayguns known as Happy Blasters, which Rebecca uses to fire non-lethal ether bullets.