Emilio Lowe is Chrono Number III, and did not appear in the manga but they did mention number 3 once in a conversation.    Chronos Number III, Emilio rarely appears in the Anime, mainly in the final part of the story, on the final attack on Creed's base on Clarken Island. After the defeat of Creed, he reveals himself as one of Mason's Zero Numbers, on the Eden project.    Source: Wikipedia

Train Heartnet is the infamous gunman 'Black Cat', a cold-blooded assassin who works for the organization known as 'Chronos', bearing the mark XIII on his body. Most of his life was surrounded by violence, so Train is quiet, asocial and uncaring. However his life changes as he encounters the mysterious Sweeper (bounty hunter), Saya. Her unique way of living interested Train but tragedy occurs, resulting in Train changing the way he has lived towards the life of a Sweeper with newfound friends Sven and Eve.

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Dado Monteiro is a Brazilian actor, voice actor, dubbing director and broadcaster.
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Train Heartnet, also known as "Black Cat," was an infamous assassin for a secret organization called Chronos...until he abandoned that cold-blooded existence to live on his own terms as an easygoing bounty hunter. But is Train's past as far behind him as he thinks?
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(Source: Viz Media)