Arachne

An arachne is a bug type monster, with the lower body of a spider and the upper body of a human, that dwells in dark places such as caves and deep within forests. They have high intelligence, but most of them are lustful and belligerent. Since they have high physical abilities, they are very dangerous creatures.

They make sticky thread inside their body and use it to make a net-like web, and surprisingly, they're proficient in sewing.
Their main body and threads are weak to fire.

Has its origin in the story of Arachne from Greek mythology.