Jonathan Monroe Craig is an American-Canadian singer, widely recognised for his tenure as the former lead vocalist of renowned post-hardcore bands such as Dance Gavin Dance, Emarosa, and then Slaves, as well as his role as co-lead vocalist in the short-lived supergroup Isles & Glaciers. Presently, he serves as the lead vocalist for the American post-hardcore band Old Flame. As a solo artist, Craig has released two studio albums, two EPs, and a live album, garnering acclaim for his distinctive soul-based singing style.

Emarosa is an American rock band formed in Lexington, Kentucky, in 2006. The band currently consists of lead guitarist and founding member ER White and lead vocalist Bradley Walden, who joined the band in 2013. The group has undergone several line-up changes throughout its career, with lead guitarist ER White being the sole remaining founding member. Originally oriented towards post-hardcore and alternative rock, Emarosa has gravitated towards a more pop rock sound in recent years.