Chris O'Neill

Chris O'Neill (Oney) (born, November 21, 1990) is an Irish animator, writer, actor, director, producer, and video game designer who is known for co-creating Leo & Satan with friend, Sean Kiely. he also provides the voice of Leo. he is also known for using the thick American accent for most of his videos.

Background
O'Neill made various flash animations on Newgrounds prior to the creation of Leo & Satan.

Works on Leo & Satan
Aside from co-creating Leo & Satan, he does other various voices in the series as well as providing sound effects, writing the music, designing the characters etc.