(Lizzy)
*You appear to be*
A famous, single and attractive actress who puts on shows throughout the country (wherever the railroad/boats can take you). Mr. White helped bring your show to the area a few times in the last couple years and it was natural for you to be invited to this retreat. You also have a fascination with most things Asian as they seem exotic, mysterious and new to you.
*You really are*
An actress with a slight problem... you're a nymphomaniac. It's a good thing you travel a lot or folks might figure this out on their own though you definitely have a large male following due to it, to be sure. Mr. White discovered your "problem" as well; you two have been together every time you're in the area (mainly because he's been sponsoring your acts). He also fixes you up with different Asian trinkets from his import business and he told you about "The Rising Sun", a popular boutique run by Miss Mauve in the city. You manage your condition in a discreet manner - you usually only have sex with someone who has nothing to gain from it (ie. they'll want to keep it secret). You also are able to contain yourself fairly well until you are actually alone with someone so you don't come across as a lady of ill-repute.
*Last night you were*
Enjoying yourself by conversing with the folks that had arrived and weren't completely exhausted by their trip. You enjoyed some of Colonel Mustard's stories though his flirtations with you fell by the wayside as your attention was on Prince Maroon, a most notable eligible bachelor who's visit to the area has been the talk of the press and town. As it was becoming clear that Mr. White was not going to see you that evening (he went to play poker with several others in the Study and he had intentions of staying there for a long time), you made yourself known to Maroon. Later he and you went off to the stables to compare White's horses with Maroon's Arabians. After quite a wild ride together (you don't need specifics now, do you?) he asked that you keep this event to yourself and that you return to your rooms via different paths. You left first and went in through the Ball Room. Strange enough, you weren't alone there. By candlelight, you could see Mrs. Plum in a chair near one of the wall mirrors painting a self portrait... in the nude. You watched her for a short while (the female form never appealed to you so well before) and your guilt/desire enticed you to reveal yourself to Plum. She hesitated and tried to hide herself behind her painting (imagine a naked woman holding in front a painting of herself naked). Realizing the futility of her effort, she relaxed and put down the portrait and you both shared a laugh in relief. Soon after you heard a bang from the far side of the mansion and then you heard someone running up the stairs near the Billiard Room. In her fear, Plum grabbed you close. You soon forgot what she was afraid of and made love (you blew out the candle, too, so, again, no visuals though it was quite incredible). With such a full night, you both returned to your rooms a couple hours later.
*Advice*
So something happened in the Kitchen when you were in the Ballroom. You don't want to let anyone know what you were up to and you probably want to make sure Maroon and Plum stay quiet (though they both don't seem the type to talk about it either). You figure Plum didn't do it, but what was her husband doing and does he know? You like her enough that learning more about her paintings would actually be worthwhile, maybe she can show you more of her work and explain what she was trying to do last night. Maroon was also outside, maybe he saw something? Lastly, Mustard seems to like you some, he could be another source. You probably won't be alone with anyone this evening, so no worries about your "problem" being revealed again.
*Addendum*
1) Inspector Brown looks familiar, where from?
2) Maybe someone you saw at acting school?
3) Yes, that's it, you've seen him perform before. He's an actor!