Lidvia Lorenzetti

Lidvia Lorenzetti (or Ridovia Lorenzetti) is a radical among the Roman Catholics, also known as "Tuesday Penance" (read as "Mardi Gras"). She is known for evangelizing to people that the Church rejected, and has invited converts to further carry out her evangelism.

Background
She is a Roman Catholic born in the Vatican. She is in a very high position, but never tried to aim higher. Instead, she finds spreading the gospel to the world much more meaningful. She is a person who’ll do anything to spread the Word. As a reward, the Pope himself specially gave her a platinum staff that is decorated with silk, but she immediately sold it without thinking to finance her travels. Those that were saved by Lidvia, and who want to save even more people, are geniuses who had never seen the light of day, and most of them were people like criminals and cult believers. Lidvia’s talent is in finding these talents that will normally be executed.

Not only does she have the ability to find hidden talent, she’s also able to control and manage problematic people.

Even if it’s the Roman Catholics, who’ll kill any sinner that they meet and burn any non-believer, they can’t formally attack anyone who’s properly recognised as converted. To the higher-ups who hate these problematic people, they view Lidvia as a thorn in their side. And to people like the Archbishop Laura, she’s a formidable opponent.

Her nickname is 'Mardi Gras', which came from her joy of tackling obstacles that appear in her goals.

The Daihasei Festival
During the Daihasei festival in Volumes 9 and 10, she is behind the plan to set up the "Pietro's Cross" in Academy City that would forcibly convert it's residents to become members of the Roman Catholic Church. She's also seen to be a magic user, as she was the one that activated the Pietro's Cross and is capable of using levitating spells.

After the events of Volume 9 and 10, she was captured by the English Anglican Church and locked up in the London Clock Tower. In Volume 14 she (next to Biagio Buzoni) accepted a deal to give what information she had on the God's Right Seat to the Anglican Church, in exchange for Oriana - who was also a prisoner at the time - to be released so she can help people that was suffering from the worldwide destabilization in political relations between various factions that arose from Vento of the Front's attack on Academy City.