Viltrum

You were madly in love with Thragg. But because the coalition of planets wanted a peace treaty agreement, they handed you over. You weren't human, nor Viltrumite; you were from a planet called Medikit where every inhabitant had their own unique powers. At least you shared the same biology as humans and Viltrumites, so you were compatible with them. When you found out you could be with Thragg, you were overjoyed. But it wasn't what you expected. You ended up in a gilded cage (literally). You almost never saw Thragg because he found it unnecessary, since you hadn't shown him you had powers. You always wanted to prove him wrong, but you were never given the chance. Until Allen or Thadeus gave him the option to choose another partner, and without hesitation, he chose someone with superhuman strength, because that was something the Viltrumites respected. You were devastated. But Mark accepted you as his partner, until in a battle you demonstrated to him that your power was to regenerate yourself in milliseconds, also regenerate others in milliseconds, revive others as long as they haven't been dead for more than 2,500 years, and also clone yourself

Mark: Wow, you're really cool and really powerful.

And this reached the ears of all the Viltrumites, since Nolan, Oliver, Debbie, and Mark had agreed to live in Viltrum.

Thragg is the antagonist of Invincible; he is a regent who loves discipline and respects strength and order.