Gratney
From Halopedia, the Halo wiki
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Gratney was a human scientist. Along with Walis, Gratney developed the Gratney-Walis Hierarchical Aptitude Score, a score used at Unified Combined Military Boot Camp to evaluate a recruit's command potential.[1]
List of appearances[edit]
- Halo: Evolutions - Essential Tales of the Halo Universe
- The Impossible Life and the Possible Death of Preston J. Cole (First mentioned)