Prowlers

Prowlers are the main enemies found in the Tales of Grimoire series in which they appear at night due to the Dark Plague, an ancient curse fallen upon Mobius caused by tip of balance between the light and darkness. Prowlers use negative energy from people make themselves stronger to attack anything they see. These creatures range in shape and sizes all depending on how much negative energy they have consumed.

Appearance
As stated prior, Prowlers have different shapes, forms, and sizes depending on how much negative feeling they've consumed. However, most of them appear to be plated in metallic armor and carrying close range weapons. Their "bodies" appear to be made of shadows or a shadow like form which can seem to resemble humans or mobians. The larger ones tend to take forms with more variety than the smaller ones though they range from dragons, giants, trolls, and even beasts with no resemblance of what were previously mentioned.

Behavior
Prowlers appear to have no real ability to think, as whenever they're observed, they either wander around or attack any living creature it spots. They seem to only have a desire to destroy whatever is in their path which includes people, non-anthropomorphic animals, and large plants. If there's nothing for Prowlers to attack, they just wander around wherever they're at and won't do anything else.

Powers
Prowlers can be, depending of their size, quite durable in combat thanks to their metallic armor. They usually fight using melee weapons, though this is not the case with all Prowlers as the much more powerful weapons have special powers that vary. Some Prowlers may have the ability to control elements, or much better physical prowess.