Morgan Henderson is the former bassist of the post-hardcore band The Blood Brothers and the indie rock band Sharks Keep Moving, the current bassist in the post-punk band Past Lives, and a multi-instrumentalist with Seattle-based folk-pop group Fleet Foxes. and Seattle based folk group The Cave Singers. Henderson has also been credited for playing a range of keyed instruments, including piano, accordion, and a Nord II synthesizer. As with the other former members of The Blood Brothers, he grew up in the eastside suburbs of Seattle, Washington, attending high school with his bandmates in the late 1990s when the band originally formed.
Henderson has cited experimental and progressive music as his main influence when writing for The Blood Brothers. Electronic music is also a major influence for him, and was incorporated integrally into the sound of The Blood Brothers.