Talk:Arachne/@comment-23603505-20140524165640/@comment-71.28.61.32-20140524173858

My guess would be that whoever translated the original profile just happened to pick that specific word to describe the Arachne.

Like I said, fiendish is basically a synonym for wicked, mean or cruel. Synonyms are words that mean the same thing. Fiendish means the same as all those other words when it's used as an adjective, or describing word. So a fiendish person could also be called a mean person or a wicked person.