Birthday: November 13

A talented oboe player who falls for Nodame at first sight (oblivious to her true nature) and performs the inaugural solo of the R☆S orchestra. Because he tends to be phlegmatic and quiet, many members of the R☆S orchestra think of him as "samurai-like".

Though he is crushed and distracted after learning about Nodame's actual nature, Kuroki becomes a good friend to both Nodame and Chiaki and goes on to study abroad in France with them. Once there, he has much difficulty adjusting to the language, people, and culture, making it hard for him to socialize and make friends.

His awkward and quiet demeanor earned him the scorn and nickname "Glauque" from Tanya (meaning dark and depressing, also means green/blue-ish). However they do seem to warm up to each other later. Kuroki later becomes a member of the Roux-Marlet Orchestra conducted by Chiaki.