"Who became the Grand Duke at the young age of 18 thanks to his bloodline, was swayed here and there without being able to do anything the way he wanted. So, wouldn't he be so angry that he had to make a reckless advance?"
Carl was a good actor.
To some, he was seen as a gentle angel, while to others, he was seen as a creepy monster.
And to some, he was the material of a great monarch, to others, he was a strong ally, and to others, he was a trustworthy lord.
The reason Carl could easily deceive and manipulate others was not because he simply decorated himself well.
In fact, Carl could not clearly define himself. Humans define themselves through their relationships with other beings.
However, Carl had no memories of his time until the age of 16, and Hanchang-in had all his memories of the people around him erased.
For Carl at present, the only 'human' was Lilly.