Resource used: https://civitai.com/models/22530
Ryunosuke Naruhodo's assistant.
Weight: 0.8
Trigger: susato mikotoba
Default Outfit: floral print, japanese clothes, pink kimono
Ryutaro Naruhodo: black headwear, hat, black military uniform, black gakuran, long sleeves, black cape
Considering Susato's Ryutaro's outfit is meant for her him to look androgynous, you may add that to the positive prompt, but I don't think it's necessary. Nonetheless, specifying that outfit in that way is also really important (see sample images).