Final answer:
Morgan Luttrell is the twin brother of Marcus Luttrell and shares similar personality traits with him. He is brave, loyal, and dedicated to his duty as a Navy SEAL.
Step-by-step explanation:
Morgan Luttrell is the twin brother of Marcus Luttrell, a former Navy SEAL who wrote the book 'Lone Survivor.' Morgan is described as being very similar to Marcus in terms of personality and physical appearance. He is also a Navy SEAL and has served alongside Marcus on several missions. Morgan's personality can be characterized as brave, loyal, and dedicated to his duty as a soldier.