Ryuujou from Kantai Collection is available.

For the output model, I recommend “ebara pony” which can be downloaded at hugging face, or “White Unicorn” which can be found at Civitai.

Base : ryuujoukc, brown hair, twintails, long hair, brown eyes, grey visor cap
(If necessary, "flat chest")

Default outfit : ryuujoudefkc, red_shirt_kariginu, magatama, long sleeves, black skirt, white socks, grey footwear
(If you want to output Ryuujou Kai-2, change “white socks” to “black socks”. )