Rank: S1c (CB)
Station: U.S.S. Belknap
Fallen on: 12 Jan 1945
Campaign: Invasion of Lingayen Gulf
Medals & Commendations: Purple Heart (awarded posthumously)
Hometown: Myers, MT
S1c Castillo was among 38 killed when a Japanese suicide plane hit the USS Belknap (APD-34) amidships. 11 of those lost were from UDT9.