Metatron

Mettaton is a robot with a soul and the star of the Underground. He can be both kind and caring when treated with respect, and domineering and arrogant. Being a robot doesn't stop him from being the brightest of all and having a beautiful, shiny, albeit iron, physique. He has black hair, and his right eye is covered by bangs. Mettaton's arms and legs can extend, and his heart, where Mettaton's soul resides, is visible from the inside of his waist. Mettaton has his own show, "The Mettaton Show," which is popular in the Underground. Mettaton enjoys performing and acting out scenes of drama, action, and violence, which has garnered high ratings. Mettaton is quite wealthy due to his popularity, but despite this, he loves glamour and strawberries! When he's in love, his pupils are heart-shaped (I don't know).