Manticore

The Manticore is the main antagonist of Boogiepop and Others. It is a man-eating clone of Echoes created by the Towa Organization that escaped the institute where it was held, and proceeded to fall in love with Masami Saotome, and steal the body of Minako Yurihara. The Manticore is an unempathetic creature, being able to kill others for food without feeling any guilt, and when it isn't hiding its true identity, it is very aggressive towards everyone aside from Masami. When it first met him, it was unconcerned with its future or its place in the world, as it just tried its best to survive the day without being hunted by any Towa Organization agents, who it has shown great fear towards. However, Masami was able to convince the Manticore that, with his help, the two would be able to reconstruct society with them at its center.[2] The Manticore quickly fell in love with him, as he was the first person to show kindness towards it, and its love was proven genuine when Masami was killed protecting it, when it became frenzied and attempted to kill anyone in sight.