Life with Lisidorwei should be happy.
Doro lay on the stone by the white riverbank, where he and Mohe often fished, enjoying the gentle and warm sunlight on his body.
The sunlight inside the mansion was also quite warm, but when enjoying it like this, knowing it was Charlette's arm, always made him feel slightly uncomfortable. So Doro came to this place to bask in the sun.
If you ask about his deep thoughts after marrying Lisidorwei... it would be that, this time, he truly realized that he is a "human." A plain and ordinary "human." A Hero? A General of the Demon King's army? Apart from those identities, what kind of being is he, what does he need to do, and what does he have to face?
He genuinely felt the relationship between him and Lisidorwei changing, just as he initially said, Lisidorwei doesn't truly love him, and he doesn't truly love Lisidorwei either.
But something was quietly changing.