Oluwatosin Ayoyinka Olumide Abasi, is an American musician, best known as the founder and lead guitarist of the instrumental progressive metal band Animals as Leaders. He has recorded and released five albums with Animals as Leaders: a self-titled debut, Weightless, The Joy of Motion, The Madness of Many, and their most recent album, Parrhesia.

Animals as Leaders is an American instrumental progressive metal band from Los Angeles, California. Since 2012, the band has consisted of Tosin Abasi, Javier Reyes, and Matt Garstka (drums), having originated in 2007 as a solo project by Abasi. They are a prominent band within the djent scene. Prosthetic Records released the band's eponymous debut album in 2009. They have since released the albums Weightless (2011), The Joy of Motion (2014), The Madness of Many (2016), and Parrhesia (2022).