Please answer the following question: What is the full name of the person who finds Nikki courting Masha?  Answer the above question based on the context below:  In 1914 Tsarist Russia, Prince Peter Karagin is a captain of the Cossack Guards, riding home from manoeuvres to an evening of wine, women and song at St. Petersburg's Cafe Balalaika. The Balalaika's new star, Lydia Pavlovna Marakova, is blackmailed into attending the officers' party and is expected to choose a "favoured one." She intrigues Karagin when she makes good her escape instead. Masquerading as a poor music student, Karagin insinuating himself into Lydia's family and circle of musician friends, unaware that they are dedicated revolutionaries. He discovers his larcenous orderly, Nikki Poppov, courting the Marakovs' maid, Masha. Karagin then bullies Ivan Danchenoff, Director of the Imperial Opera, into giving Lydia an audition; Danchenoff is pleasantly surprised to find that (unlike the 60 other women foisted on him by other aristocrats) she has real talent. Later, Karagin orders his usual arrangements for seduction, but falls in love instead and tries to cancel them. She understands both his former and current motives, and admits she loves him too.
A:
Prince Peter Karagin