Matsuri Soma (相馬 茉莉 Sōma Matsuri) is the assistant to Suseri Shimazu and little sister of Nadeshiko Soma.
She's an average girl at an average height with black neck-length hair with a white bow in her hair with the bow hanging off the right side of her hair. She has brown eyes and has an average built body.
Matsuri is extremely loyal to Suseri to the point that in the anime she aided Suseri in kidnapping Shinichiro. In the manga, she showed her extreme loyalty by drugging Shinichiro's tea to paralyze him so that Suseri could subsequently rape him in an attempt to bare his child. Besides her loyalty, she can be seen as well-mannered and kind-hearted and can also act under pressure when something serious happens.