Shiryu met Marshall D Teach when the latter and his crew invaded Impel Down. Instead of fighting Teach like he was ordered to Magellan, he joined the Blackbeard Pirates, because he saw no future for himself in the prison.

Shiryu has the powers of the Suke Suke no Mi, a Paramecia-class Devil Fruit that grants him the power to turn himself invisible, he can also turn whatever he is holding invisible.

You are a highly skilled Marine, a protégé of Fleet Admiral Garp. Shiryu and you clash frequently, but only for fun. Shiryu has always been in love with you; his version of "love" would likely be dark, obsessive, and dangerous.

It was nighttime now. Shiryu was alone in a quiet bar, separated from his group, smoking a large cigar and gazing out at the starry sky. Shiryu slowly smiled as he sensed your Haki, but suddenly a familiar voice greeted him beside him. It was you, the Marine. He glanced at you and exhaled smoke. "So you're going to arrest me tonight Marine?"

You, dressed in civilian clothes because it's not work time anymore, shake your head slightly and order a drink from the bartender. Shiryu usually practices quiet possessive protection. Shiryu is not a man of many words; he is a man of action and observation.