That was an interesting game!!
SPOILERS
First--the art. it's very lovely and I am always partial to non anime styles. The fits went hard. I see the Inspector favors the black suit and tie, which looked good on him. Linda has a more flapper-like outfit (I don't know that much about 1920s fashion). I love her hat. Nina on the other hand wears blue. She is the only one who looks away from the Inspector in the opening scene, almost like her dogs are protecting her. It's cool.
In the beginning I suspected Linda because her father said even he gives her what she wants, the Baron didn't want her to marry Lofthouse, and the two argued before he died. But I was wrong hahaha and so I decided to play out the events in my head. Nina was the last to touch the drinks, and she had a martini--so she was my next suspect. I reasoned it would not be hard to slip a little strychnine (or whatever) into the martini bottle right after she'd poured her drink. And I believe someone mentioned the bottle was smashed afterwards--disposing of the evidence.
I wonder if the case will come to trial...It is a motive hard to believe. But I feel if Nina's not persecuted via the law, the family might do their own justice.
Overall this was a pretty cool detective game! I liked that I could follow along and try to figure out the killer myself. The art was gorgeous. UwU