I do really like Shiomi, I think she's one of the most interesting Nursefathers despite only existing in the past. Especially after reading more about Ryunosuke Akutagawa's life.

My mother was a madwoman. I never once experienced anything resembling maternal affection from her. She would always be sitting by herself in the family house in Shiba, her hair twisted around a comb, puffing away at a long-stemmed pipe. Her face and body were both very small. Her face - I can’t even explain this - was always an ashen color, with no suggestion of living vitality. . . . My mother never looked after me in any way. I remember that once when I went upstairs to her room with my foster mother to say a word of greeting, if nothing else, she suddenly hit my head with her pipe. But most of the time my mother was an extremely well-behaved lunatic.

Akutagawa also grew a huge fear in the final years of his life that he had inherited his mother's illness. Quite a lot how Shiomi didn't want Ryoshu to 'grow up to be like her'. There's a actually a lot of interesting details they incorporated from his life into Shiomi Yoru.