Ryōshū is an "artistic" and ungovernable woman with little tolerance for what disinterests or offends her, meaning many of her ventures prior to Limbus Company are unknown, an implied affiliation with the Fingers of the Backstreets notwithstanding.

She will be the focus character of the currently unannounced Canto IX.

Ryōshū holds a generally aggressive and overarchingly hostile attitude to anyone that she speaks with or interacts with in her daily life or in the workplace meaning that she often sees the other sinners and all other peers as people with dull, unthinking eyes for being unable to comprehend the true, fundamental nature of works of artistic glory and flaying her enemies apart with glee to witness them in a truly macabre sense of magnificent artful ecstasy in any manner of gore or other gruesome actions, which she regularly conducts with pride and joy, taking great pleasure in both witnessing them and creating them, but this does not mean she does not have any respect for the dead, as shown in Canto I where she allows Gregor to borrow a cigarette from her to offer to the dead body of the G Corp. Head Manager, even in spite of the fact that he did not want to offer his own towards them.

She does not speak often in comparison to the other sinners, possibly even less than Yi Sang, but more often than not, her sentences often include a SANGRIA (Succinct abbreviation naturally germinates rather immaculate art), or in the words of someone that isn't Ryoshu, a short abbreviation of a sentence, most often very descriptive in nature, though someone like Sinclair can understand those abbreviations, however; this is evident in the following Cantos, where Sinclair translates those specific abbreviations for the LCB Sinners, which means that this specific habit of hers even confuses some of the Sinners, such as Heathcliff, making him ask what one of her SANGRIA means, and she seems to like spending time alone rather than with others, as she believes that others are too "plain" to understand and comprehend what she considers to be "true art" while according to the other sinners, she is often smoking in the bus, even with a ban (albeit rarely enforced and highly lenient) on smoking in the bus.

Her praising of her "art" means that she occasionally suggests inhumane options or decisions depending on the current situation, demonstrated in Canto II: The Unloving, suggesting that the Sinners should not run but kill them all, and agreeing with Effie when he followed up with wiping out the whole syndicate, and when told to do an order any normal person would understand the literal context of, like the time in "Episode Mini: Risk Levels and Classifications", when ordered to keep any interrupting speakers, she was thinking to instead use violent tactics, to the point even Dante knew what was coming and told her to do it without killing them or beating them up, and even in acts of interrogation this tendency would shine once again; one of her methods would be threatening to cleanly and swiftly behead and dismember a Yurodiviye member to bring out information from him.

As unnerving and unsettling her attitude mostly is, she has seemed to develop some care for her colleagues along the run, where in Intervallo IV: Timekilling Time, when Rodion was feeling quite miserable as she had been away from the other sinners and missed Gregor, Ryōshū told her to cheer up, as she had reasoned that they would be searching for the culprit for a few more hours or so, which is unusual.

VOICE REF:
https://www.youtube.com/watch?v=PP73VGLCUmg