The Stranger

"Eh, and why wouldn't you? After all, there's no reason for you to trust a being from the XdX Universe, now is there? A failed world, full of foulness and injustice, where the eye sees no good-...

That, is but a mere singular factor, of all the others which deem my spite for you...reasonable."

- Infamous Blue and the Above conversating

Infamous Blue is an appearing character in the prologue chapter of Highschool DxD: The Path of Redemption. He is confirmed to be a dragon god from another universe called the XdX Universe.

Appearence
On his very first debut in Antydeth's stories, Infamous Blue appears as a very 'handsome-faced' man. His body is described as slim, long and elegant, just like the black velvet tuxedo he wears. The tuxedo also has an eight inch long tie of the same coloration. His hair is of dark blue colours and his dark blue pupils, similarly to the Above, glow in a nightblue shade(which is practically the same).

His true form has not been shown nor mentioned.

Personality
"It's just the fact that you and the Omniversal primordials, as well as this sentient world sound so terrifying, but the fact that you all are facinated by some random being, a child nonetheless, just makes me want to... want to... 'lmfao'. Yep, exactly that!"

Since only a conversation between him and the Above has been shown, it cannot be exactly determined how he prefers to act. Though, the Above entity itself admires his intelligence and cleverness which suggests that he may even be a genius or a supergenius. He is a very imporant leader figure of a group of beings that 'cause ruckus' all across the whole Omniversal, meaning he is an extremely influential being.

History
Infamous Blue had been confirmed to originate from the XdX Universe. At one point in time, it is known that he became a leader figure for the Dark Crusaders. The major events of his life are a mystery right now, but it is said that the dragon god had also vowed to destroy the Above entity.

Power
Infamous Blue, as confirmed by the Above, is the strongest entity from the XdX Universe. Nothing specific can be said about his strength and his abilities just like his full story are a mystery. However, once again confirmed by the Above, he is roughly on par with the likes of Great Red and Ophis, if not even stronger than them.

Reletionships
Right now, only two are known:

The Above
The Above and him are not very kind-giving to one another, despite the latter appearing somewhat friendly with her. The Above feels a mixture of strange fascination, distaste and admiration towards Infamous Blue. She admires his intelligence, is fascinated with his ambition, but also dislikes him because he causes a tremendous ruckus in her Omniverse. Infamous Blue on the other hand, although appears friendly, has a passionate contempt for the Above. He desires her destruction and the reason for this is unknown even to the Above entity itself. He seemingly prefers to speak in a polite and elegant tone, but often mocks the Above, jeers her and makes ill-mannered gestures. As quoted by the Above, the Infamous Blue believes her to be his true enemy.

Issei Hyoudou
At first, Infamous Blue views Issei as 'a simple ant amongst million other', simply because to him, he is another solar deity from that universe. He even finds the fact that the Above, the other Omniversal entities and 'Suu' are so deeply invested into the Solar God, laughable.

However, after he is told of his Rise, the dragon god's opinion on Issei differs. So much so, that he says that Issei might be worth about an hour of his precious time. He begins to feel honest interest towards Issei, which causes him to leave the Above alone as he is curious about trying out something with the Solar God.

Trivia

 * His appearence is based off of Cinematic Marvel's Loki in his Earth costume, as well as a human version of the SVTFOE super villain- Toffee.
 * There's a sense of duality between him and the Great Red, as both dragons are ranked as gods amongst the dragon kin, both are the strongest of their race and their universe.
 * "Infamous" is an antonym for "Great". "Red" and "Blue" are often depicted as opposing colours.
 * While not originating from the DxD Multiverse, Infamous Blue has made several contacts with it, which partially deems his place in the DxD Fanon Wiki as at least reasonable and understandable.