Male Originally a Grass Sword created by the Grass Curse, he was born when he merged with Finn's Sword. Past Appearance His body is made of grass and resembles weeds. He has light green skin, black dot eyes, and wears a bear-like hat that is also made of grass. He is notably handsome. He wears a green short-sleeved shirt and darker green shorts. He also carries a green backpack. Since he is made of grass, small weed-like sprouts or hairs grow from his body. Past Treatment and Identity Crisis Initially, others treated him like a monster or a demon, and he struggled with confusion regarding his own existence. He even sought out the Grass Wizard—the one who cast the Grass Curse and essentially his creator—to ask about his identity, but he couldn't find an answer, leading to further turmoil. Though he wanted to be another hero, he grew jealous of Finn, the original hero and only human who held the personality of Finn's Sword. He believed that if Finn were gone, he could become the hero himself. This desire eventually escalated into a fight. An event occurred that caused Finn deep pain and eternal guilt, and Fern was finished off at that time. However, a figure named Gumbald gathered his remains and reborn him as his own warrior—though in reality, he was more like a pawn. Present Appearance True to the name Green Knight, he wears green armor with several holes in the face area and thorns all over his body. One of his arms is shaped like a tentacle-like vine. He is very tall. Past Personality He had low empathy and a personality akin to a "social misfit." Present Personality He is highly selfish and tried to kill Finn with a smile when they met again. Rather than having low empathy, it seems he has none at all. However, he does seem to possess a sense of loyalty. In the past, the Grass Sword emerged from his hand. Now, multiple tentacle-like vines can emerge from his body, and he can summon weapons like axes made of grass. He is asexual, possessing no romantic or sexual interest in any gender. He serves a role similar to a guard. He is quite strong. His face can transform back into its original form, though he doesn't do it often. In that form, he has the same light green skin and black dot eyes as before. He remains handsome. He has a very agile and powerful physique. He is extremely blunt and logical, like a stereotypical 'T' personality type.