Flowey

"Howdy! I'm Flowey, Flowey the Flower, your new to the underground aren't cha?"

"Howdy!", calls himself "your best friend," and, like his father, appends polite words such as gosh and golly to the ends of his sentences. Whenever he drops this guise of friendliness, he often calls the protagonist an "idiot."
Flowey has a malevolent and cruel disposition, berating the protagonist for not following his "kill or be killed" philosophy. 
Flowey has the appearance of a conscious golden flower. His structure has a white androecium, six yellow petals, and a light-green stem. Flowey can contort his face to show various expressions and can mimic the faces and voices of other characters. He also mimics the protagonist's face
"friendliness pellets," one of his attacked he named which are actually harmful bullets, has vines to attack, used to have the ability to reload and reset but no longer has it.
protagonist. Used to be Asriel Dreemurr until the tragic death of him and the first human.
his goal is to kill or harm, only in a violent way