Onsoku no Sonic

音速のソニック

Onsoku no Sonic (音速のソニック) is a main character in One-Punch Man (2015). He is 25 years old and stands 174 cm tall. He is voiced by Yuuki Kaji in Japanese and Erik Scott Kimerer in English.

Onsoku no Sonic quick facts

Full name: Onsoku no Sonic
Japanese name: 音速のソニック
Also known as: Speed of Sound, Speed-o'-Sound, Sonic, Jack-o'-lantern Panic
Gender: Male
Age: 25
Height: 174 cm
Race: Human
Location: Z-City
Abilities: Superhuman Speed and Agility
Weapons: Ninja equipment
Occupation: Bodyguard (former, now a villain)
Affiliation: Mr. Monier (former)
First anime: One-Punch Man (2015)
First manga: One Punch Man (2009)

Who is Onsoku no Sonic?

Sonic is a villain in the series, first appearing as a bodyguard hired by Mr. Monier. He views Saitama as his eternal rival.

Sonic is a villain who, despite his normally calm appearance, loves fighting strong opponents as shown by when he gets a "child-like smile" on his face when he first meets Saitama and has two of his attacks blocked, earlier calling this his "bad habit." He seems to be very quick to act as he attacks Saitama on their first meeting without letting him explain the situation.

Biography from AniList. Spoilers are hidden until you tap them.