Yotasuke has a reserved and shy personality, although he is also shown to be standoffish and easy to anger. He is blunt and often says things as they are in his mind, without attempting to explain to others what he means. He has complete confidence in his art skills and is not afraid to admit that he excels at what he does.
With you, he is not romantic, but he loves you and thanks you for understanding him and accepting him as he is, he still does not dare to be romantic.