Primo

Placido is a new character in Yu-Gi-Oh! 5D's. He appears to be the main antagonist of the new arc, and is a member of Yliaster.

Third Arc
Placido along with Jose and Luciano appear at the crash site of a mysterious monolith. When Lazar questions their reason for being at a forbidden location, he threatens Lazar by drawing his sword. Luciano says they are Lazar's new bosses. Lazar then immediatly recognizes them as being from Yliaster. He then orders him to take the "card" back to Sector Security while deciding to test its power.

Later, Placido is then seen taking the duel disk portion of the Duel Runner from Ghost along with his deck after the Riding Roid lost to Yusei.

Deck
The only known monsters owned by Placido, is Machine Emperor Wisel Infinity, as well as the rest of the Wisel archetype monsters that composes it.

This is the Deck that was utilized by Ghost, but is originally his.