SPARTAN-D3332, Kingfisher One, or Fi, was the leader and Medic of Kingfisher Team os S-III Delta Company, an EVA and Scuba operator team. Fi was born on Earth at Halifax in Nova Scotia, and was selected for the S-III program at a young age. Fi is not his real name, and it may never be known since he suffered amnesia one week in during the S-III program and never recovered the memories. He was combat trained in the battlefield and was medically trained by an ODST medic aboard a cruiser. Fi displayed immense speed, perception and dexterity in the camps, thus excelling at exchanging magazines and stripping the guns. Fi is also one of two Delta Company Deputy Executive Officers (other being William-D821).