I like how this manhwa doesn't do the thin-legged/daddy-long-legs trope just because they are tall & therefore need to be modelesque & have fashionably thin limbs with small hands & feet. All the strong men & even women have adequate muscle in their limbs too, so they look realistic, no matter their size compared to the smol FL. Everyone is well-proportionate. If their head looks small it's because their body is muscular or taller than other average characters.
And as I said before, Sai-sama looks like Black Widow's dad (in the upcoming MCU movie) so the Duchess looks like her mother as well lololol. Such a strong but wilful family X"D
That said, they can actually prove that the house has sinister plans since the beginning with that ancient diary & the family registry at the library, & if they got to see that burning bridge-cage. That fire pit seems to burn endlessly, like a neverending curse.