Shiromi has the height of an average human, with long hair white in the left half and black in the right. He wears a white tailcoat jacket suit that comes with a white cravat tie and blue rose on top. His suit is opened up and also comes with black long sleeve dress shirt and a black hakama. He also wears an black top hat that has stitched two eyes and a mouth.
Like most of Basara, Shiromi has shown to have no mercy towards humans.
He, however, gets along with Hijirimaru and appeared to have saw him as a comrade, although he never admitted it in front of Hijirimaru himself. This has been proven by the fact that he held a grudge against Rokuro for killing Hijirimaru. Furthermore, he seemed to be somewhat jealous of Higano after realizing the latter seemed to be close to Hijirimaru. He was shown to be unable to understand the way he felt about losing Hijirimaru and realizing he was used as a bait by Sakanashi.
During his final moments before succumbing to his wounds against Arima Tsuchimikado, Shiromi was shown to harbor immense spite and anger at humanity due to them carelessly creating Impurities such as himself and his comrades, for their own selfish purposes and truly hates and despises them for trapping them in Magano and killing them for their own leisure. And during this time,it was shown that Shiromi truly cared for Hijirimaru and was genuinely jealous of Higano for being close to him, wondering that if he, like Hijimaru had someone to fight for and protect,could he have become much more powerful and evolve past an Impurity as Hijimaru did, but upon realizing that he had no one by his side any longer, gave in to the despair of his fate due to realizing nothing matters once you die and the things that you lose won't ever come back.
Powers and Abilities
As the Fifth Basara, Shiromi is a strong and powerful impurity. Proof of his abilities is that Rokuro and his team were incapable of defeating him and he would have defeated them if it weren't for Arima Tsuchimikado interference.
- Mara Tori (魔螺刀罹 Mara Tōri?, lit. Intangible Reff): Shiromi's Impure Death Equip. It transform his body lower half into a octopus-like limbs that can be stretched and hardened at will. 
- Impurity Servants: Shirmoi was seen having employed several lower impurities to serve him,as seen where he sent several to attack the Enmado House Members and later he was seen riding on top of a gigantic dragon like Impurity during his attack against Rokuro Enmado that was seen to be powerful enough to nearly kill him using its jaws.
- Spinal Thorn Whips: During his final struggle against Arima Tsuchimikado,Shiromi was seen having morphed his fingers into spinal,bone like whips barbed with thorns for multiple long range attacks.
- Dragon Form: In a last bid to defeat Arima and being enraged upon learning of Sakanashi using him as bait, Shiromi transforms and morphs himself into a gigantic dragon like impurity by unleashing all of his power at once, with the technique being powerful enough to even injure the Head Exorcist, earning Arima's praise due to its sheer raw power and causing him to then deem Shiromi to be truly powerful and someone worth remembering.
- "The Basara you murdered... Hi-Hi-Hi-Hi-Hijirimaru... was my former comrade in arms...!!"'
— Shiromi, to Rokuro about Hijirimaru
- "The only r-r-r-r-reason you've survived for this long... is because of the fact that you're one of the Twin Stars Exorcists!!"'
— Shiromi, to Rokuro
- "F-F-F-F-Fade into obscurity as a forgettable nobody!!!!"'
— Shiromi, to Rokuro
- The name Shiromi means "silver mirror" (銀鏡).
- The most noticeable trait in Shiromi's speech is his tendency to stutter.