article_snippet: The former drama student, who had ambitions to become an actor before joining the US Marines in California aged 21, was described by his comrades as 'Kosta's one-man army' who raised the morale of fighters.
article_snippet: John Foxx, who served alongside his in a team of foreign fighters nicknamed the Chappies, said: 'his was hands down one of the greatest human beings I have ever met.
article_snippet: Mr Foxx added: 'Mr Foxx would always volunteer to be on the ambush team, spend the night on the [defence fortification] or go on any assault.'
article_snippet: Mr Scurfield added: 'Kosta wanted nothing more than to bring the fight to the enemy.'
article_snippet: and when he went into the Armed Forces it was a big surprise.
article_snippet: You put people in groups - certain things people might do with people lives and I would never have had he down as becoming a soldier.'
highlights_snippet: '
  Archaeologists' son joined elite Navy regiment after studying drama .
  
highlights_snippet: Friends say '
  Archaeologists' son had 'deep sense of the duty' and  was 'angry' about ISIS .