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The Shadowy Figure is an entity that communes with Sans to give him advice and assist him with technology. The Shadowy Figure is an potential antagonist in the Underearth arc in Undertale Rho. He has the ability to remember every timeline due to his expertise in Time magic. The Shadowy Figure also has extreme mastery over his Gaster Blaster. So much so that he can create armor based off of it as well as creatures of the Gaster Blaster design.