[@mmarage]

"Costume..?" Gaster frowned a little feeling a little confused still but still, this human at least seems to know him from somewhere? Coming up with an idea Gaster spoke calmly while raising both hands high enough so he could see right through both holes in his palms. "I think your mistaken? Introductions are in order I think. My name is W.D Gaster, this is no costume. Behind me...is I guess a robot going by the name of Fready. [@Blueflame]

Lowering his hands back into his pocket as he had proven his point he waited patiently watching the human before him to see his reaction.