Straizo

Straights is a minor character featured as an ally of the protagonist in Part I: Phantom Blood and an antagonist in Part II: Battle Tendency.

Phantom Blood (1888-9)
Straights is, along with Dire, one of Tonpeti's followers. He aided Jonathan in the fight against Dio and his minions, defeating Page, Jones, Plant, and Bonham to protect Poco and Peggy. Soon after the end of Part I, he was asked to raise the baby Jonathan Joestar saved from the exploding boat by Erina. He accepted the child and raised her into the adult primarily known as Lisa Lisa.

Battle Tendency (1938-9)
Straights is reintroduced as part of the team that discovered Santana and a set of stone masks. Almost immediately after this discovery, he betrayed Robert Edward O Speedwagon and the rest of the team, incapacitating them easily and donning one of the newly discovered Stone Masks, turning him into a vampire. He explained that he had always envied Dio's strength and beauty and, as a result, desired to stop his aging process. He died after battling Joseph Joestar in New York City, overloading his own vampire body with hamon and stating that he wanted "to taste youth and go to Hell rather than age pathetically like an old man and go to Heaven", but not before confessing to seeing the pillar man Santana almost awaken from absorbing the blood of this former teammates, faking Speedwagon's death, and dumping their bodies into the river in order to prevent Santana's awakening.

Trivia

 * Straights is the only vampire who could also use Hamon, this being because he was a hamon user before his transformation.
 * It is arguable that it was because of his ability to use Hamon that vampire Straights could be seen as relatively weak, as the two "strengths" are essentially incompatible.