Hakai

More formally known as the Dragon of Destruction, Hakai is initially one who craves ripping others apart, and has a deep bloodlust within him that seems to have no bounds. Because he and Jinsei (the Dragon of Creation), when united, form the Dragon of Rebirth, he seems very strict on not getting too close to anybody. He hates love, but he hates what he is unfamiliar with more - that is to say, if his body is invaded in some way or another (be it a cold or a weapon), Hakai will lose his composure entirely and freak out. This stems from his 7000 experiences of death, which always happened whenever his Host was either murdered or could no longer handle his powers. As a result, Hakai is very modest in some senses, and lashes out if anyone else tries to push his boundaries by even a smidgen.

When Takuto, Crysta and Annie discovered the dark mirror in King Blue's castle, he was initially hateful towards Crysta's dark counterpart, believing her to be just as lovey-dovey. However, when Dark Crysta voiced her love for destruction, he quickly calmed down and became rather close to her once they both gained their own bodies. This may be partially influenced by Takuto and Crysta's Soul Bond. However, Hakai has claimed Dark Crysta as his own Mate, giving her a full-body Mark to denote this. He seems to adore Yami Annie, as he seems to have a positive bias towards succubus and incubus. Now that he seemingly has free reign to destroy as much as he likes (provided they're on opposing sides), he seems much more tolerant of the rest of the team.

Now that Dimenda (formerly Dark Crysta) has become the destined Progenitor of Vulcan, Hakai plans to stay by her side forever. He's especially happy that she's her own person now, rather than being entirely dependent on Crysta.

He seems to adore anyone that has a destructive nature, such as an energy leeching one or otherwise.

Eventually, adoring Yami Annie and her help in killing sprees, he and Dimenda took her as a Mate, and gave her enough energy to create 4 children, who he seems very protective and proud of. Unusually, Hakai is fairly protective of his children (especially his Mates and theirs though too), and often teaches them survival skills whenever he has the chance to.

After Takuto was killed and took Hakai with him, Hakai became tethered to Dimenda's soul entirely following Takuto's rebirth. Now he's much more cautious, and spends much of his time hidden in Dimenda's form as dark energy (which would boost her skills). He does do as he likes all the same, but is less likely to appear out in the open as much as he did before.

A sketch of Hakai. Note that he has 4 horns, and his hairstyle, while similar to Takuto's, looks notably different. His eyes are red, and his hair and extra limbs are black, compared to Takuto's colorations.