Lycantrope, or generally known as werewolves, are supernatural species. In the episode, bad moon rising, Mason Lockwood transferred into a werewolf as on that night it was a full moon.
History
They attack human beings or any other animal on sight.
Psychological Characteristics.
They are aggressive even in human form. For example, Tyler lockwood often had difficulty controlling his rage.The ones with the werewolf curse still latent can exhibit some supernatural traits which can be triggered by aggression, along with unusual physical strength for the person's given size. However, they cannot fully transform.
Werewolves have higher body temperature than humans. Tyler experienced this, as he feels as if his skin on fire, when he activated his curse. Once curse is activated, their eyes turn yellow, while enraged. Just like Mason's eyes did when he stopped the fight between Tyler and Carter (Brave New World).
It can be painful, while this curse being activated.They will transform into a canine form, when there is full moon after sunset, looking very much like a timber-wolf, only slightly larger. Their displays of supernatural strength and speed distinguished them from regular wolves.
Anyways, not all werewolves look identical. Vampires are principally their prey, but they do attack humans.Werewolf will maul, rip apart and devour their prey, whether it's human or a vampire.
in 1864, George Lockwood attacked several humans and killed them, leaving terrible wounds on the corpse, which is much worst than some vampires would have. This is a proof when Henry tells Katherine that the wounds ''worse than anything he had ever seen before''.
Appearance
They have glowing yellow eyes with a wolf form. Werewolves, in a wolf form have different fur colours. Mason Lockwood has white and grey fur and Tyler Lockwood has black fur. Apart from the full moon, werewolves, appear the same as any other human for the rest of the month.
Triggering the werewolf curse
In order to activate their powers, a werewolf has to kill a human. Their eyes will turn yellow and powers will activate, after the curse is triggered. They will instantly become stronger and faster, as soon as the curse is triggered.
Werewolf transformation.
Only under a full moon, a werewolf will transform. Before transforming, the person is subjected to at least five hours of pain and the first transformation is quite slow.
The body of the person is twisted in an unnatural manner as bones reshape and shift to form a wolf skeleton, causing the person immense pain during the transformation. After that, the person grows, excessive body hair and become feral and huge eyes that glow yellow and fangs, then in minutes that person becomes a wolf. After a few hours, the werewolf returns to their human form. The werewolf will experience muscle aches,after the first transformation. Other werewolves can control themselves to some extent on the night of the full moon.
Powers and abilities.
Super strength: They are stronger than any human. But they are not as strong as a vampire, while in a human form. They can be more powerful than vampires when it's a full moon. Jules, a fully transformed werewolf, knocked down and overpowered Rose, a 500 years old Vampire. Another once was Damon Salvatore, a 100 plus years old vampire could barely hold Tyler Lockwood, the transforming werewolf.
Super Speed: Compared to any human and some vampires, werewolves are much faster, and they use this abilities in human and wolf form.
Heightened Senses: They have extremely keen senses of smell, sight, taste, and hearing.
Super-Agility: Werewolves can move, jump, climb and run very fast without difficulty or tiredness and they posses superhuman agility.
Accelerated healing: Werewolves bodies will hear near instantaneously, if they ever injured because they possess superhuman regenerative abilities.
Durability: Without much discomfort or injury, werewolves can take far more than humans.
Lie detection: Beware, they are able to sense if you're lying!
Werewolf bite: Werewolves bite is extremely lethal to normal vampires, but not to an Original.
Full Moon : This is when, werewolves powers and abilities are enhanced.
Shape shifting: Under a full moon, werewolves can turn into a wolf, but they have no control over themselves.
Weaknesses
Wolfsbane: Wolfsbane causes a werewolf to become severely weak and feverish, when digested. If a werewolf's skin is exposed to wolfsbane, it can result in burning them.
Device: It's a weapon designed to emit a high frequency noise that could only be heard by vampires and werewolves. And it's invented by Jonathan Gilbert (Enchanted by Emily Bennett)
Broken Neck: Werewolves can die instantly, by breaking their neck.
Magic: The werewolves' blood vessels can explode if witches curse and inflict supernaturals aneurysms.
Heart extraction: Instant death can occur for werewolves if their heart is removed.
Myths: The truth is, silver does not make werewolves weak, as it only heal when wounded by silver.
Werewolves appeared in wolf forms in Bad Moon Rising, By the Light of the Moon, The Last Day and The Sun Also Rises.