Aono was most known for the roles of Shiro Sanada (Space Battleship Yamato), Rihaku (Fist of the North Star), Nurarihyon (GeGeGe no Kitaro), Piccolo Daimao and Kami-sama (Dragon Ball), Kumahachi Kumada (Kiteretsu Daihyakka), Dakuan (Ninja Scroll), Gen Fu (Dead or Alive), Dezsaras (Transformers: Victory), Jinpachi Mishima (Demon form) (Tekken 5/Tekken 5: Dark Resurrection) and Tomozō Sakura (Chibi Maruko-chan).

In the live action field, Aono was the official dubbing artist of Joe Pesci and Christopher Lloyd.

In May 2010, Aono checked into a hospital for an aortic dissection and suffered a stroke shortly thereafter, thus ending his career as a voice actor.

At about 4:38 pm on April 9, 2012, Aono suffered a bout of post-operative multiple cerebral infarctions and was found dead.

[2] Voice actress Eiko Hisamura announced Aono's death via her Twitter feed, and video game designer Hideo Kojima stated via his Twitter that he will retire the Roy Campbell character from the Metal Gear series out of respect for Aono.