( Celaena knows because as i recall she told you at the ball ) 

Rowan continued battling guards, he seen a blade coming, he managed to deflect it then spun around behind the guard and raised his sword up and brought it slamming down on the guards head, he sensed another attack a heartbeat before it happened and then swung around to deflect that attack, he brought his fist up again and slammed his fist against the guards face, he felt the guards face crunch and seen the guard drop, then left his helper and ran to the door, he tried to open by hand and could not, so he tapped into his mind and let his wind take the door down.  He then walked in using his wind power on any guards that tried to take him down "FireHeart.. get up " He said using Celaena's Fae name