The first time Allen felt fear was when he was too young, either 5 or 6. When he first went outside his house and met a wolf-type monster. Then he got scared again when he fought the goblins for the first time. After that, many things happened until finally his mother died, and he wanted to take revenge; Allen became a person who would not be afraid of anything; that's what he thought.
He fell into the dungeon and saw that face at the bottom of the deep water.
A fish without eyes smiled at him while showing off its sharp teeth. Then, when the mouth opened, the pointy teeth filled the entire mouth. Its tongue was tiny, located at the end of the oral cavity; if not for Allen's good eyes, humans might not be able to see the tongue.