Beni

"With this rouge, I become Beniyasha, Destroyer of Lands. Tremble before the bloodthirsty dawn! Bear witness to your end, if you dare!"

- Moroha using her Beni

The is a cosmetic product used to apply color to the lips. The quarter-demon Moroha can temporarily transform into Beniyasha by using her rouge which also gives her the memories of her late dog-demon grandfather. decades ago, it was originally given to Lady Kikyō as a gift by Inuyasha, but was later destroyed by the shapeshifting demon Naraku when he had posed as Inuyasha, in order to kill Lady Kikyō.

Riku had somehow managed to reconstruct it and presented it to Hōsenki II, for the Black Pearl to be made again.

History
In the anime Izayoi is shown to have been born in a wealthy/noble family and possibly used the rouge to present herself on formal occasions. After her death Inuyasha kept his mother's rouge as a memento, along with the Robe of the Fire-Rat. Some time later, Inuyasha would gave the rouge to his first love Kikyō as a gift. The rouge was later crushed by Naraku when he struck her down.

Inuyasha's and Kagome's only daughter Moroha currently holds a rouge that gives her the ability to transform into Beniyasha. According to Myōga this rouge was given to Izayoi by Tōga and have a unique property. Moroha also stores the Red Rainbow Pearl she obtained from Tōkotsu inside her rouge compact.

When Moroha was trapped in a dream during the fight with Yotsume, it is shown that Kagome had to tearfully pass Izayoi's rouge as a parting gift to her infant daughter in an unknown incident involving herself, Inuyasha, Sesshōmaru and Kirinmaru.

It was later revealed that after Naraku destroyed the original rouge, it's fragments were gathered and made into a new one, which contain Izayoi's tears of grief for her husband's death, so that Riku had the Yōkai jeweler Hōsenki II use it to create the Black Pearl, the later which can create a path to Tōga's tomb.

Physical description
The rouge appears as a red thick cosmetic cream stored inside a scallop shell compact that has a tiny red bow tie decoration at its beak. Moroha's Red Rainbow Pearl can be seen inside her rouge compact.

Demonic Properties and Skills

 * Demonic Transformation: When Moroha applies it, Myōga had stated that "Tōga's memories are revived in her blood", and she becomes Beniyasha, therefore gaining access to her own dog-demon form as her father had in dire situations. Its full strength is yet to be unleashed.
 * Skeleton Melting: Beniyasha emits an aura that is strong enough to disintegrate bones.
 * Power Augmentation: The demon blood of Tōga amplifies his youngest granddaughter's natural abilities to greater levels but only for a few moments. It increases her natural superhuman strength, agility, speed, durability, and reflexes, and makes her fangs and claws ten times sharper than normal; a feat that Lord Kirinmaru admires.

Trivia

 * It is customary since ancient times for women (at first for noble women, later for common women as well) to use cosmetics, including lip-coloring makeups.
 * Lord Kirinmaru expresses his respect for Moroha's natural abilities and strength when they increase somewhat from it applying the pure demon blood of her late paternal grandfather, but is amused that she is incapable of maintaining such a powerful and deadly demonic form for longer than a few moments.
 * It is in the title of Episode Nineteen of Hanyō no Yashahime.
 * Lord Kirinmaru is impressed and intrigued at it granting Moroha greater demonic strength from the late Tōga's blood and memories.
 * It had put Moroha on the same power-level as Setsuna, whose demonic side was just released due to Zero's intervention, but then Setsuna had overpowered her in nearly ten minutes. Moroha had referred to applying the demon blood to her lips was a way for her to "go all out" against much stronger adversaries.

InuYasha

 * "What is it?"
 * "No sense in me keeping it, so I might as well give it you."
 * "Are you sure I can keep this gift?"
 * "The only things my mother left me were that and the Robe of the Fire-Rat."
 * "This rogue doesn't become you at all."

Eighteen Years Ago

 * "Give him this as well."
 * "And this shell here? What's it for?"
 * "That was the rouge Lady Izayoi used."
 * "I'm surprised you were able find that."
 * "I think it's best that I hold on to this gift."

Fourteen Years Ago

 * "This is a keepsake from Inuyasha's mother. I decided if we ever had a girl, I'd give this to her."
 * "I'm glad the Black Pearl and Lady Izayoi's rouge were useful."

Season One

 * "With this rogue, I become Beniyasha the destroyer of Lands."
 * "This rogue is a gift from the Great Dog-Demon to his wife, Lady Izayoi. When Lady Moroha applies the rouge, his memories are immediately revived in her delicious blood."
 * "Use your precious rouge and become Beniyasha."
 * "It's right here. You don't want to lose this."
 * "I heard you were about to use your rouge."
 * "It seems you have gotten a bit stronger."
 * "You cannot even maintain that form."
 * "I'll have to go all out, too."
 * "This is the first time I ever felt so calm after applying my rouge."

Appearances
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InuYasha

 * Episode 147
 * Episode 148
 * Episode 151

Hanyō no Yashahime
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 * Episode 2 (Hanyō no Yashahime)
 * Episode 4 (Hanyō no Yashahime)
 * Episode 5 (Hanyō no Yashahime)
 * Episode 7 (Hanyō no Yashahime)
 * Episode 8 (Hanyō no Yashahime)
 * Episode 9 (Hanyō no Yashahime)
 * Episode 11 (Hanyō no Yashahime)
 * Episode 12 (Hanyō no Yashahime)
 * Episode 15 (Hanyō no Yashahime)
 * Episode 16 (Hanyō no Yashahime)
 * Episode 18 (Hanyō no Yashahime)
 * Episode 19 (Hanyō no Yashahime)
 * Episode 22 (Hanyō no Yashahime)
 * Episode 23 (Hanyō no Yashahime)
 * Episode 24 (Hanyō no Yashahime)