Prompt with:

opm_suiryu,

^ That will get you the base, topless Suiryu, long hair, and armlets. If the armlets don't appear you can just prompt them.

For his normal outfit prompt:

opm_suiryu, gakuran, ponytail,

Suiryu is both lean and pretty muscular, the lora does a good job rendering his physique. You can enhance this by also prompting:

muscular male, dark skin, dark-skinned male,

Rant:
I really thought Suiryu would become more popular and hence would have tons of fanart, but he is kind of forgotten now.