Moguzo

Moguzo is the one who wields Big Sword. He may look weak, but in reality he is strong enough to destroy a monster; he just doesn't know how to use his strength properly. His appearance is a Big Guy, wearing silver armor, his weapon is a sword.

Moguzo and his friends used to live in the modern world, when suddenly they appeared in town without memories of their family, friends, etc. Sometimes they unconsciously say some words without knowing their meaning. Example: cellphone. They don't know the meaning even though they unconsciously said because it exists in the other/future world.