Arnim Zola

Arnim Zola is one of the supervillain prisoners in the Big House until the Breakout. He is one of the mad scientists who created horrible creatures and dangerous weapons.

His most notable creation are the Doughboy minions. He often gives Zemo a medical checkup every week about his condition. He even allows him to borrow the Doughboys to distract the Avengers while Zemo gets inside the Mansion to kill Captain America.

But the plan failed, as Zemo returns to Zola's lair, he discovered Zola's unconscious body surrounded by the Enchantress and the Executioner in an offer to form the Masters of Evil to destroy the Avengers.

After the recruitment of other villains into the Masters of Evil is complete, they went into the Mansion to defeat the Avengers in an ensuing battle, only Zola stayed behind to guard their lair.

When the Enchantress and her Executioner came back with the Norm Stones, he was among the Masters of Evil with new members waiting for them. Though Zemo ordered everyone to seven separate locations to guard the stones, Zola stayed behind again for he has no hero to fight.

It is possible that he'll return in season 2.

In Ultima, Arnim Zola was recruited by Padro Lodo to join the Organization as a scientist. Zola agreed, hoping to use his genius in order to create new biological weapons in the Bio-Researching division of the Science Dept. for the Organization.