Arachne

Arachne is a sub-species of Terratect, with the upper body of a human and a spider for a lower body; what kind of spider depends on the species of Teratect it was before evolving. It is a special evolution available only to small-to-medium sized Teratects with the Pride Skill.

Monster File
A monster with no confirmed sightings in recorded history. As such, there is little to no information about it, and it is shrouded in mystery. It is said that the human part of the monster's body has the appearance of an exceptionally beautiful girl, but this is only a rumor, the truth of which is unknown. Because there are so few witnesses, it is questionable whether this monster even exists at all. The only sightings occurred during periods in which the Nightmare of the Labyrinth or a Nightmare's Vestige were also sighted, so it is thought that witnesses may have simply mistaken them for this creature. Because it's very existence is in doubt, it is impossible to measure the danger level of this monster.

Evolution Conditions
This transformation is first mentioned in Chapter 23.
 * Owning the "Pride" skill.
 * Being a small size or medium-sized spider.
 * Having a minimum level of 50

Trivia

 * It is mentioned that this monster actually has two brains. The spider brain and the human brain. If one brain is destroyed, the other can take over the functions of both
 * Due to the requirement of reaching Level 50 and being a small or medium sized spider, the only known spider evolution that can reach Arachne is Zana Horowa due to its inability to evolve further.
 * Orthocadinaht may also be able to reach this evolution due to being unable to evolve further and small size classification.
 * For some reason, Kumoko loses the Swim skill she had as a Zana Horowa.