Sūmi Masēn/Tropes

A - G
Affably Evil: Despite being one of the most dangerous members of Faux Babylon, if not the most dangerous one, Sūmi is actually a very nice person. She'll usually treat her guests well, ask them how they are doing and even show concern...
 * Faux Affably Evil: ...That is, until one realizes that she always has an agenda. The tea is seldom without poison, the questions without scrutiny and the pleasantries without intent of self-amusement. She just loves to see people's faces when they realize that a refined attitude is not synonymous with kindness.

Beauty is Evil: While Sūmi does possess some weather-worn features, she is still considered to be rather aesthetically appealing, despite possessing some child-like features. And it's also common knowledge that she is one fucked-up individual. The contrasts between Sūmi's more conventional beauty and Vishvalita's androgynous, flaw beauty also makes for a different example.

Chinese Vampire: All her underlings belong to this category.

Dead Guy on Display: A slightly different example. While she does not exactly display bodies ceremoniously, the Wicked Hermit forces corpses into her service by turning them into Kyonshī. Some of the figures in her service, Sheema Kobanette and Daishi Mukuro for instance, were prominent figures in society. The fact that she has killed and forced them into her service might even be more frightening than humiliating display.

Even Evil Has Loved Ones: Subverted. Sūmi has yet exhibited genuine human affection towards anything that is alive. While she is fond of mockingly touching people gently, she intentionally does this to screw with other people. This particular trait has dehumanized her apparent persona so much that her undead slave Sheema seems more human than her. Let that sink in for a second.

H - P
Names to Run Away From Really Fast: Her epithet, The Wicked Hermit, is by no means incredibly intimidating and much less hammy than, say, Tenebrasia's title. However, when one analyzes the words, epiphany may strike: she is a hermit because she is so malicious people avoid her.

Paper Talisman: What she uses to control her Kyonshī. If they are removed, they regain autonomy, but they're quite stuck.

Q - V
The Sociopath:

The Unapologetic: A huge defining factor when it comes to Sūmi's behavior. While she is known for taking her theatrical performances with her guests to the very extreme, there is one particular trait that gives away her act: she does not apologize. While few actually notice this, those who do just perceive it as a rude tic.
 * Irony: She goes by the name of Sūmi Masēn, an obvious pun on Sumimasen (すみません), which translates to I am sorry.