Griefer

Griefer is shown to be highly insensitive and immature, frequently making offensive, hurtful, over-the-top comments adjacent to an annoying teenager. He enjoys wreaking havoc and commanding people with violence, far enough to have his father forcibly pull out the Venomshank for him (which also shows he has a degree of intelligence, knowing that only a Guardian or someone approved by one can pull out the sword). He also seems to own a lot of what he likes, having brand new "Green Goop" cards all to himself, and having his own two monitors, implying he may be spoiled.

Griefer also appears to be highly athletic, showing this in being able to jump large gaps and over dense vegetation, which players would usually need rocket boots and the iron sword to overcome.

Mayor Thaniyel, his father, has stated that Griefer was not always a bully, implying that he was a decent person before going after the Venomshank. This is confirmed as you follow the Griefer to the Komodo Dragon’s den and when the Bubonic Plant is defeated. After you return him to normal with a cure, he eventually introspects on his audacious personality and thanks the player for restoring him to health as well as offering his help to the player to assist them whenever necessary. He's also shown to be grieving over the loss of his mother as her death was his motivation for obtaining the Venomshank to destroy it for ruining his family and take Mayor Thaniyel away.