is a Japanese voice actor and singer. He was represented by Atomic Monkey and is now a freelancer. His major roles are Josuke Higashikata in ', Taiga Kagami in Kuroko's Basketball, Zenkichi Hitoyoshi in Medaka Box, Kaname Tsukahara in Kimi to Boku, Masayuki Hori in Monthly Girls' Nozaki-kun, Jun Isashiki in Ace of Diamond and Ultraman Belial in the recurring Ultraman Series.
During his high school years, Ono aimed to become a professional soccer player and at one point was scouted by the Shimizu S-Pulse. He stopped playing in the third year, due to bone fracture.
During his years in university, Ono becomes a fan of Kishà  Taniyama. In addition to meeting the voice actor in person at an anime event, this inspired him to pursue the same career.
In August 2011, Ono formed the voice acting unit alongside Takuya Eguchi. The two had also worked on various Drama CD productions and events. In January 2013, it was renamed to .
In March 2013, he was awarded for "best actors in supporting role" in the 7th Seiyu Awards.
On October 2, 2017, Ono announced his marriage from the last seven years prior in his blog post. His wife is a person working outside the entertainment industry. In August 2020, Ono announced the birth of his first child.
Ono revealed on NHK that his father is also an NHK announcer and hence, under his father's influence, he wanted to try to take more narration works in the future.