Oro

Oro(オロ) is a character in the Street Fighter series. He first appeared in Street Fighter III and is voiced by Kan Tokumaru in New Generation and Street Fighter III: 2nd Impact and by Takashi Matsuyama in Street Fighter III: 3rd Strike. "Oro" in Spanish means "gold", likely referring to his skin color.

Story
Oro is an ancient, mysterious hermit who seeks a fighter that is worthy to inherit his fighting style. He is of Japanese descent and hails from the Amazon Jungle where he lives in a cave with his many pets, including a turtle and a dog. Oro made his living as a martial arts instructor in Japan in his younger days. He moved to Brazil with a friend in the early 1900s. Unfortunately, his life in Brazil wasn't going very well and he eventually became a recluse. He spent much of his time practicing Senjutsu (仙術, "Mystic Arts" - techniques used by the immortal mountain hermits in Taoist myth). Finally, after several dozens of years, Oro had mastered it.

Oro occasionally leaves his cave and visits town. Out of boredom, he embarked on a journey (traveling the world atop a jumbo jet) to seek out the ideal successor to his Senjutsu style. This was the first time he left Brazil since he moved there.

He defeated Ryu in the 3rd World Warrior Tournament (during Street Fighter III secon inpact). He then trained Ryu for 2 years in his martial arts style, then Ryu defeated Him was a final test of the training, proving Himself a match for Oro(more like due Oro's xtreme boredom in not finding a worthy opponent in the world).

Ibuki fights Oro as a test to pass her ninja school graduation exam. Oro was disappointed at first because he thought she was asking him for a date.

Around the end of the 3rd World Warrior Tournament, Oro, sensing Akuma's extremely powerful and murderous ki, thought to test his strength against him. The two fought, yet there was no set winner.

Techniques
Oro binds one arm while fighting, to keep from accidentally killing his opponent (except when performing specific special arts). Canon-wise, Oro is one of the most powerful characters in the series, alongside Akuma at full strength (Shin Akuma) and Gill. He has full mastery over his Ki, giving him monstrous strength and stamina far surpassing all other fighters in the world, even in his old age.