Ernst is pathetic
What is the point of writing many pages about a new character that achieved nothing and has no use for later either?
Why do you think he is not going to be of any use later? We are moving toward international conflicts in the 3rd years and he is the only not-American outsider in the story left.
Spoiler:
By the way, he claims Rosen has no interest in Erika to Leo, but every options he gave Leo had "have sex with Erika" in the "footprints" and later after saying he "gave up" he ask her if she wants to be adopted into Rosen anyway.
Seems to me what he wants Erika too, or at least her kids. All of Leo's kids are going to belong to Rosen because of the Fortress genes, so Leo's being the father of Erika's children would mean that Rosen owns them.
Why do you think he is not going to be of any use later? We are moving toward international conflicts in the 3rd years and he is the only not-American outsider in the story left.
Spoiler:
By the way, he claims Rosen has no interest in Erika to Leo, but every options he gave Leo had "have sex with Erika" in the "footprints" and later after saying he "gave up" he ask her if she wants to be adopted into Rosen anyway.
Seems to me what he wants Erika too, or at least her kids. All of Leo's kids are going to belong to Rosen because of the Fortress genes, so Leo's being the father of Erika's children would mean that Rosen owns them.
This is a little more detail about Ernst and his view on Erika.
Spoiler for spoiler:
The book never says, why Ernst changes his perspective on Erika.
In the beginning, Ernst only saw Erika as a troublesome thing that he has to take care of due to her right to inherit a portion of Bastian Rozen's wealth.
Everything starts with Ernst's hatred towards Lucas Rozen, Erika's grandfather. Lucas damaged his own family twice before he moved to Japan. First, it was the time when he helped Georg Ostburg to escape to U.S. And, the second time was when Lucas broke the engagement and moved to Japan. To be more precise, Lucas was the mastermind behind Georg's escape. The book did not mention why Lucas arranged for Georg to escape, but after the event, Lucas was removed from important tasks such as dealings with the military. Elders at Rosen were disappointed due to Lucas's talent and intelligence, so they decide to use Lucas as either a pawn for political marriage or a business manager. But, he broke the engagement and moved to Japan. Lucas's action damaged Rozen's standing in high society(社交界), and German government distrusted Rozen, and they thought Rozen helped Lucas. So, Rozen could not expand to Japan for a long period of time.
Ernst felt, Lucas died without paying back his debt to his own family, so Ernst thought it is okay to request the help from his descendants(Erika).
After the battle, Erika entered Ernst's room and warned him to stay away from her and Leo. Ernst accepted the defeat and told her, he will stay away, and he suddenly asked Erika to join Rozen family.
Personally, I think, the author may not have enough pages to put additional details to explain why Ernst suddenly changed his perspective on Erika.