Isaac and the Black Sword Knights are responsible for training the Maihama army. While he's in Maihama Isaac gets to know the new crown prince of Maihama, a young boy named Iselus.  Iselus respect looks up to Isaac and respects him.
At a party for the crown prince's birthday, assassin's make an attempt on his life.
Don't breathe it in, Iselus.
Halte die Luft an, Itherus!
No respires, Icelus.
Arrête de respirer, Icelus !
Non respirarlo, Iselus.
Não respire isso, Iselus.
Не дыши, Исельс!