Lavender is the ContributorTale version of Flowey.
Initially, Lavender operates under a façade of friendliness and politeness. She often greets the protagonist with southern slang, such as "Howdy!", calls herself "your best friend," and, like her father, appends polite words such as "gosh" and "golly" to the ends of her sentences. Whenever she drops this guise of friendliness, she often calls the protagonist an "idiot."
Lavender has a malevolent and cruel disposition, berating the protagonist for not following his "kill or be killed" philosophy. Despite this, she also criticizes the protagonist at the end of the Ruins if they killed any monster. She is manipulative, devious, and a cunning planner and subtle if the circumstances require it. She retains his memories between SAVEs because she was once able to SAVE. She is also shown to be extremely cowardly, as she kills her former father to appease the protagonist in a vain attempt to save her own life in the Genocide Route's conclusion.
Lavender appears as a sentient purple flower who usually grins passively. Her structure has a white androecium, six purple petals, and a light-green stem. Lavender can contort her face to show various expressions and can mimic the faces and voices of other characters. She mimics UndertaleTrash3 and TheNitroFlamer in some situations, as well as her old self at the end of the Genocide Route. She also mimics the protagonist's face before the Neutral Route's final battle.