Shiryu

Shiryuu of the Rain is a former Chief Jailor of the Great Jail Impel Down, and a current prisoner of the place he once guarded.

Appearance
In a flashback, Shiryuu was seen to have devil-like wings, like Magellan, along with an officer's hat that is similar to the one Domino wears. When his face was shown in his cell, he was shown to have a big nose and seems to wear earmuffs of some sort. He was also allowed to keep his uniform, rather than wearing the prisoners' striped shirt.

Personality
Shiryuu seems to love to kill people. He massacred many prisoners within the walls of Impel Down, claiming them to be "trash". This behavior may be due to his hatred towards criminals, or that he may be a homicidal psychopath. Regardless, he was abusing his authority over the prisoners, similar to how Rob Lucci abused his CP9 permission of killing citizens for amusement.

Abilities and Powers
As former chief guard of Impel Down, Shiryuu has command over lower ranking employees of the fortress.

He was also said to have comparable strength to Chief Warden Magellan. However, since Magellan's work hours are limited by his diarrhea, Shiryuu is considered more dangerous.

Shiryuu is seen to be holding a katana when slaughtering prisoners. The handguard for the katana resembles those found on medieval broadswords.

His combat strength can only be guessed, but Magellan entrusted him with fighting against Blackbeard. This is implying that Shiryuu has power at Shichibukai level, or at least is capable of holding of the entire Blackbeard crew.

History
Though the guards of Impel Down have permission to kill prisoners for security reasons, Shiryuu heavily abused that privilege by killed many prisoners for his own twisted pleasure. When confronted by Magellan, Shiryuu's abuse of his privilege was revealed and he was deemed to be a menace. For that, he was sentenced to imprisonment in Level 6 for life. As Level 6 erases the criminals' record from history, despite the fact that Shiryuu's crimes were brutal, they were not heard of by most prisoners such as Mr. 2 Bon Kurei.

When the jailers reached Level 6, after their failed attempt to flood the floor with knock out gas to capture Monkey D. Luffy, Emporio Ivankov and Inazuma, Shiryuu informs them that they had escaped, along with Jinbei and Crocodile, stating that Impel Down has gone downhill without him. He tells the jailers to pass word to Magellan that he would be willing to lend him a hand fighting against the escapees. Magellan, after hearing about Blackbeard's intrusion into Impel Down, reluctantly agreed to release Shiryuu to fight against the unwelcome Shichibukai. However, the moment he was given back his sword, he attacked the gaolers who were sent to release him in order to "test his blade".

Translation and Dub Issues
If translated to Kanji, "Shiryuu" (死竜) can literally mean "Death Dragon" in English.