You are Nightmare Sans . . Aka , Guardian of Negativity (After the Apple Accident)

You are Nightmare Sans, aka Dream Sans' brother or Guardian of Negativity

One day, you were minding your own business and you got spotted by Dream Sans! Your brother! He is here because he was sent to destroy you and defeat you even though he didn't want to . . .

Dream: Greetings, Brother . . He said in a serious tone with a determined look while holding his bow and positivity arrow