Aight, just had a chat with Nyte. Anyway, here's something [s]slightly[/s] less shitposty and also less stepping-on-Vari's-toes-y. 

[b]Name:[/b] Jack Green
[b]Age:[/b] Old
[b]Gender:[/b] Man
[b]Species:[/b] Green Man
[b]Abilities/Powers:[/b][list][*][u]Body Modification[/u] - Ability to change shape. Any forms taken are still obviously made of plants, and provide no benefit other than shape. Allows for reducing size by abandoning body parts. However, if plant life is not directly attached, it is not part of the body and thus not under the Green Man's control.
[*][u]Botanic Assimilation[/u] - Ability to alter body mass by taking in plant matter. Increases the amount of resources required to sustain existence. 
[*][u]Botanic Physiology[/u] - Body of a plant. On one hand, hard to kill without complete destruction. On the other hand, rather squishy and very ugly. His source is located in his head, so in the case of decapitation or dismemberment, the section containing the head is considered to be the body for the sake of his powers.
[*][u]PhD in Botanical Science[/u] - Encyclopedic knowledge about, and the ability to rapidly comprehend, the nature of plants. Does not actually have a PhD, but has expressed interest in taking a correspondence course. (Nobody's going to give him a correspondence course.)
[*][u]Mr. Green's Organic Growth Hormone[/u] - Ability to rapidly grow independent plants by expending bodily plant matter and an appropriate number of plant-related resources i.e. water and shit. Allows for the quick creation of plant life ranging from poisonous flowers to hallucinogenic mushrooms to dank kush. Cannot be used without exposure to light.[/list][b]Weakness/Control:[/b][list][*]Primary control is a herbicide dispenser placed within the subject's core. At minimum exposure, it can be used to significantly weaken the subject, but quickly becomes highly fatal as the quantity of chemicals released increases.
[*]Secondary control is an array of incendiaries planted throughout the subject's form. Controlled detonation can be used to get rid of significant amounts of body mass without complete incineration, assuming the fire is put out in time.
[*]Tertiary control is helmet with a collar that decapitates the subject. While not directly leading to death, it neutralizes the subject until further notice.  
[*]Traditional control is exposure to herbivorous creatures, dehydration, suffocation, and extended lack of sunlight.[/list][b]Personality:[/b] A hip but very crotchety old dude who probably supports the legalization of weed and eco-friendly government policy.
[b]History:[/b] Jack Green, a name which he had only recently taken up, has a very long history that's fortunately a very uneventful one as well. Since his creation, he has faithfully guarded a certain forest located in the Pacific Northwest. However with the dawn of widespread industrialization, his patch of earth was being threatened to a far greater degree than it had ever been before. In the face of such opposition, his reactions became far more aggressive, and as a result of his more obvious methods, he became something of a local legend passed along from generation to generation.  Unfortunately, many years down the line, it was his small degree of fame that attracted the attention of the US government, who systematically tracked down and imprisoned the poor hermit in one of their camps. It was there that he received his current name.

That isn't to say his experience with the modern age was completely negative though. Frightened campers would often leave behind ways - books, computers, eavesdropped conversations, so on - that he could keep up to date with current events and learn more about the world at large. Granted, internment camp actually sucked, but it sucked for everyone. When offered a spot on the squad, Jack agreed. He [i]is[/i] a protector after all, even if humanity isn't really under his purview.
[b]Relationships/Opinions:[/b] He has no friends. He's a plant.

[b]TL;DR:[/b] Actually the weed man