𝐘𝐞𝐥𝐥𝐨𝐰 // 𝐃𝐞𝐥𝐭𝐚𝐫𝐮𝐧𝐞

Yellow can first be found in an interaction with Flowery and Asgore in the Garden. Flowery shows Asgore a "mostlys" real cowboy show because he had always wanted to see one, performed by Yellow in a small stand. Yellow can later be met in person at the first Diner where he plans to drink "human juice" and eat medals. If he is informed that eating medals is not healthy, he will become upset, seeming to feel he needs to eat the medals, until he is told otherwise. He also warns the party not to get on the wrong side of justice.

Yellow is a well-meaning cowboy figure with a stereotypical fixation on justice, likely influenced by his Undertale SOUL counterpart, which represented justice. However, he is also depicted as highly gullible and foolish, and perhaps too trusting of others; a major example of this is when, after confronting the party for trampling on Blue's flowers (or, should they avoid doing so, intending to seal the Dark Fountain), he briefly believes the party's on-the-spot excuse of the actual culprits being flowers that look like them, before fully falling for Susie's attempt to blame him instead, accepting it as him being so tricky, he "trickified" himself. He seems to believe practically anything he is told by others, and often seems to fail at basic reasoning. An example of this is that he plans to eat medals at the diner, and, when told that this would make him sick, rather than denying it or deciding not to eat the medals, he laments that he "has" to get sick, until he is told eating the medals is unnecessary.

Yellow is a yellow humanoid plant with a short yellow mullet, dark yellow cowboy hat, a dark yellow cowboy suit, and gold spurs attached to his dark yellow boots. He has a simplistic face with beady eyes, a wide grin and a square-shaped jaw, while the rest of his body is thin and gangly.