Leonidas Dimitris, a boy from Farther earth, was Connor's best friend, before and during his kidnapping by the Black Crusaders. He was kidnapped with Connor and Felix by Marx. He is introduced in Part I - Experience.

He was a successful Synthetic Nymph injection. The animal chosen for him was a fox. He was more susceptible to it's influence, partially because of his sheepish nature, and partly because of how cunning the fox was. The nymph's influence had a strong hold on him from the very beginning, which made him more vulnerable to external manipulation. Connor learned that he was changing quite fast because of the Rabbit experiment that was put on both of them, and Leo's strange behaviors during the tests.

He was born in farther earth.

After Natz's Coup D'état, he is drastically and permanently changed. He takes on the name Leonidas/Lee as he turns into a new person.