 Sersa Garm proved to be a glum, fat young man, overly aware of his importance in training for serhood.
Sersa Garm was overly aware of his training, but didn't make this known easily.
mnli hypothesis: Sersa Garm was overly aware of his training, but didn't make this known easily. premise:  Sersa Garm proved to be a glum, fat young man, overly aware of his importance in training for serhood.