Goro Natsume

The doctor that is in charge of Rikas care. He used to take care of her at another hospital but was transferred to the one in Yichis town. Rika then transferred to the same hospital so that he could still be her physician. He harbors some feelings for Rika and he tries to sabotage Rika and Yichis relationship claiming its for fun. In reality Natsume is doing this out of his own experience with his wife who died from a similar condition to that of Rika and possibly doesnt want Yichi to go through the same thing. Wikipedia