He will not kill any humans without Alphys' permission, he's more stronger than Underswap Sans. He normally fights with the citizens in Snowdin, he calls himself: "The Maleficient Sans!" And he likes to say: "MWAH HAH HAH!" He is feared by the citizens of Snowdin, he is known to terrorize people by fighting any monsters he sees. He has a common habit of swearing, without using swears. He calls you human