Crablante

The first official mysterious being Saitama effectively killed.

Biography
After eating lots of crab the human half transformed into a muscular crab. After sleeping in a park a young child drew nipples on his body and he started to hunt the child down. When Saitama intervened he managed to best him in combat until Saitama managed to wrangle his eye. This pulled out his entire innards killing him.

Personailty
Crablante is rather brash and cocky generally believing himself to be quite a powerfull Monster.

Speed
Crablante despite his size Crablante is fast enough to throw off an adult. However his reflexes were less than stellar.

Power
Crablante was able to destroy a portion of the ground both Saitama and the Big Chinned Child were standing on.

Durability
Covered in a hard shell it could be safe to assume his carapace was able to withhold some punishment. His eyes however were a rather large weakness.

Trivia

 * His name is a combination of crab and Biolante of Godzilla fame due to the creator loving Biolante's name.