Destructoids

The Destructoids are monster-assassins created by Professor Gill, sent to destroy Jensen Ackles/Kikaida.

They are powerful mechanical soldiers that were initially created by Dr. Komyoji for benevolent purposes, until being upgraded for destructive purposes by Gill and his followers. They are (mostly) all loyal to only Gill himself, while having no attachments towards others. It was shown that the original thirteen were creations of Dr. Komyoji, with the rest (aside from Orange Snail) being productions of DARK's scientists. Most of the Destructoids can seemingly grow stronger if they hear Gill's flute, in contrast to Jensen's suffering from it.

Each Destructoid has their own unique personalities, with most of them being very violent and quick to show their emotions. Some of them can be rather odd at times, whether that being intentional or not a mystery.

It is interesting to note that some Destructoids do not look similar to the creatures they were based upon, to the point of sometimes being completely different looking in comparison. It was also explained in the manga the reason why Destructoids that were created by Dr. Komyoji looked like animals, was to "leave the appearance of animals that were becoming extinct", with Dr. Komyoji's love for nature and his late son being a primary reason as well.