Investigate the Princess. Alright.
Isaac was bogged down with another of the commands of his Younger Elder sister, but it was not something that urgent, he could definitely look into it.
Not only because he was scared of his sister, what was the worst that she could do? Break his arm or something? If she teamed up with his younger elder brother, poor little Isaac would have to worry about the fleetingness of human life.
But all those matters were trivial. It was just the emperor and his father were a tad too close. To the point they frequently chased each other around with a sword all over the Imperial Palace over their little games and bets. And naturally, since he was the freest of all his siblings as a child, he was also dragged over to look after the Emperor's daughter who was four whole years younger than him.