Hiro Nakamura (中村 広, Nakamura Hiro^?) is a fictional character on the NBC fantasy drama Heroes who possesses the ability of space-time manipulation. This means that Hiro is able to alter the flow of time. In the show, he was played by Japanese-American actor Masi Oka.

According to the online comic on NBC.com, Hiro is named after Hiroshima, so that his family will always remember the atomic bombings of Hiroshima and Nagasaki. Tim Kring has been quoted as saying, "It's no coincidence we named him Hiro... he truly is on a hero's quest." To this end, his name is often used as a pun. His co-worker and best friend Ando once called him "Super-Hiro" in jest. Hiro is also known for his overwhelming love for waffles.

Hiro was one of the last main characters to be created by Tim Kring; he was added to the pilot episode after Kring's wife noticed none of the existing main characters were happy about their powers. During a panel session, Kring explained that he developed Hiro as a comic book geek "trapped in a life that was kind of not of his making". Thus, viewers were introduced to Hiro as an office worker in a sea of cubicles. In an interview, Tim Kring noted, "I didn't start off by saying I want a guy who can teleport. I started off by saying I wanted a guy who felt trapped in a life that was not his dream and what could be a power that would be most wish-fulfilling for that character? And that was the ability to teleport out of that life."

Peter Petrelli, portrayed by Milo Ventimiglia, is a fictional character on the NBC science fiction drama series Heroes. He is a hospice nurse-turned-paramedic in his mid-20s with the power to absorb and mimic the powers of other people with special abilities, or powers. Sensitive and compassionate, the character was initially defined by his complex relationship with his older brother, Nathan. Since that time, Peter Petrelli has had to deal with the outcomes from the decisions that his abilities force him to make.

In the premiere episode, Peter Petrelli is a hospice nurse living in New York City. Differences between Peter and Nathan, an ambitious politician focused on his congressional campaign, cause tensions between the two, which are exacerbated when Peter starts having extraordinarily vivid dreams of flying. He confides in Nathan, who passes them off as a sign of psychological distress. Peter summons Nathan to witness as he jumps off a building to prove he can fly. However, it's Nathan who flies, catching Peter as he falls. Peter blacks out after the brothers lose their grip on each other, waking up in the hospital with muddled recollections of what happened. Nathan claims neither of them flew and Peter is led to believe he's going crazy. To discover the truth, Peter threatens to jump from another rooftop if Nathan doesn't tell him what really happened. Nathan admits that they both flew. Peter first thinks Nathan is only telling him what he wants to hear, until Nathan points out that Peter is levitating as they argue. Peter's later attempts to fly, when away from his brother's presence, are initially unsuccessful.

Masayori "Masi" Oka (born December 27, 1974) is a Japanese-American actor and digital effects artist. He became widely known for his role on NBC's Heroes as Hiro Nakamura.

Oka was born in Tokyo, Japan, to Setsuko Oka. His parents divorced when he was one month old; he was raised in a single parent family and has never met his father. He was six years old when his mother and he moved to Los Angeles from Japan.At age eight, he appeared on the CBS-TV game show Child's Play. In 1987, a twelve-year-old Oka was featured on the cover of Time titled "Those Asian-American Whiz Kids". Though he was not featured in the article itself, he was acquainted with the photographer who conducted the shoot. His IQ has been reported at 180.

He attended elementary school at The Mirman School and graduated high school from Harvard-Westlake School in 1992. After he graduated, he worked on the 1992 Summer Olympics as an English, Spanish, and Japanese translator.He graduated from Brown University in 1997 with a Bachelor of Science degree in computer science and mathematics. While at Brown, he also served as the musical director of The Bear Necessities, an all-male a cappella group. Oka described the group as a "brothership."