Seamus was about to further socialize with the queen until he and Encarnacion were cut short by the dismissal.  "I'm sorry your royal highness."  After they were to be moved, Seamus then resumed when he can.  Under a different environment that is.  Sometimes it'll be a bit difficult without the power of Guinness.

Assuming the other socializing team were in the same page as he was, he'd tell others about himself only at the right time.  "I'm a child of an agent NC pilot.  Inherited the position all the way from Ireland too.  For now, I'm just here to get the job done."  He looked to see if there was a fridge near by.  He could use a drink.  So far, the queen looked like she could hold her liquor.  Guinness was his main form of socialization, true to his roots.

So far, the queen seemed like an ally of convenience.  While he has no intention of betraying his people, enemy of the enemy is the friend.  They could easily discuss things over a drink.  Though he wasn't a total drunkard, it would take more than just one pint to get Seamus plastered for a good time.