Resource used: https://civarchive.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).