Lo Mutuc (/ˈmutuk/; formerly Charlyne Amanda Yi; born January 4, 1986) is an American actor, comedian, musician, and writer, known for their role as Dr. Chi Park in the Fox medical drama House (2011–2012), and for providing the voices of the Rubies in the Cartoon Network animated series Steven Universe (2015–2018) and its epilogue series Steven Universe Future (2019–2020), Chloe Park in We Bare Bears (2015–2019), Alice in Summer Camp Island (2018–2023), Mai in Next Gen (2018), and Larry in StuGo (2025).

Mutuc's screenwriting debut, the feature film Paper Heart, won the Waldo Salt Screenwriting Award at the 2009 Sundance Film Festival. As a comedian, their performances include music, magic, games, and often audience participation.