Kiefer Isaac Crisologo Ravena (/kifər/; born October 27, 1993), more popularly known as Kiefer Ravena or simply Kief by his colleagues and teammates, is a Filipino amateur basketball player from the Philippines. Ravena played for the Ateneo Blue Eagles in the UAAP during his college days. He is playing both guard positions. The son of former PBA player Bong Ravena, Ravena enjoyed a successful high school basketball career at the Ateneo de Manila High School in Loyola Heights, Quezon City where he was recognized as one of the top high school basketball players in the Philippines. Ravena is a three-time UAAP Juniors Champion (2008, 2009 and 2010), two-time UAAP Juniors Finals MVP (2009 and 2010), two-time UAAP Juniors Mythical Team member (2009 and 2010), one-time FIBA Asia U-18 Mythical Team member (2010), two-time UAAP Seniors Champion (2011 and 2012) and three-time UAAP Seniors Mythical Team member (2011, 2014 and 2015). He is also the UAAP Season 74 Rookie of the Year and the UAAP Season 77 and 78 Most Valuable Player recipient. At the 2011, 2013 and 2015 Southeast Asian Games, he won gold medals as a member of the Gilas Cadets (formerly Sinag Pilipinas).