Silence

"Silen" (サイレン Sairen) is a key character in Five. He is a mysterious mute man who gathers the "Winner Five", declaring he will conquer the game in 48 days with their aid.

On the character

 * 'Silen' is mute due to still unrevealed reasons, and speaks through a mechanical device. He speaks very softly and politely.

Deck
It's still unknown whether 'Silen' will duel or not.

Possible idea in case he does: An arrow Deck which manipulates both players' cards toying with "direction". Examples: His effects would deal directly with columns and Card Zones, so he'd have lots of effects based on card positions.
 * One effect places an arrow on the opponent's Monster Zone backwards, placing the monster that's played there in the Spell/Trap Zone.
 * One effect places an arrow linking two Monster Zones, causing monsters in them to compulsorily battle.

Another possibility is a Deck of "choices", that tricks the opponent into making the choices that benefit Silen the most. One similar example would be ARC-V's Kyuando Eita's Deck in the early stages of his Duel. It could also manipulate the opponent's attack and effect targets/selections.

Abilities
'Silen' is one of really few people who developed an ability triggered by Cardia' influence. His ability works in a similar way to a Dark Pattern, and allows him to toy with "directions" and "choices", usually represented by vectors of different formats. One example of this ability is how he can operate secretly inside Cardia by keeping people away from his base of operations with his vectors, making it so that no one chooses to enter there.

While it initially gives the impression that he can somehow manipulate a physical space, his power instead has influence on a person's own perception - fitting Cardia' overall influence over a person's mind and body.