Rainbow Pearls

The are seven powerful multicolored pearl-sized artifacts with immense Yōki.

Description
These pearls appear to be in multiple colors, hence why they are referred as "Rainbow" even though some colors are not of the seven in a rainbow.


 * (inside the left eye of Towa, briefly Kinka);
 * (carried by Moroha, originally Tōkotsu);
 * (inside the right eye of Setsuna, briefly Ginka);
 * (in possession of Jyūbei)
 * (on the left ear of Riku);
 * (in possession of Riku, originally Kyūki, briefly Yotsume)
 * (in possession of Totesu)

Mystical Abilities and Effects

 * Time-Traveling Portal: This ability first activated when Towa's Silver Rainbow Pearl transported her to the modern era when she was a toddler. Years later, another portal to the modern era transported Setsuna, Moroha, and Mistress Three-Eyes. After defeating Mistress Three-Eyes, the pearls of the three heroines facilitated their return to the feudal era.
 * Demonic Power/Ability Augmentation: When Mistress Three-Eyes consumed the Red and Golden Rainbow Pearls, it greatly enhanced her offensive and defensive capabilities as it had for Yotsume.
 * Activating the Energy Blade of Kikujūmonji: Using the Silver Rainbow Pearl, Towa can fully use the powers of Kikujūmonji, and form a blade of pure energy that extends from the broken sword.
 * Exorcism of Demonic Energy: In cases demonic possession, the Silver Rainbow Pearl allows Towa to separate the demonic entity from the victim, and grants direct attack to the demon without harming the host.
 * Demonic Energy Absorption: After being used by Yotsume, Kyuki used the power to drain the demonic power from the victims of the Dream-Gazing spell. Upon changing to her true form, Kyuki was able to swallow the power from Setsuna's attacks. Similarly, Towa was able to draw in the demonic energy from the wounds afflicted by demons/hybrids to make into her own.
 * Matter Manipulation: Riku can use the Blue Rainbow Pearl to create unlimited gold using for bounty for Jyūbei and dissolve a subdued Kyūki.
 * Water Generation & Control: Riku is able to control and manipulate water with the blue Pearl.
 * Dream-Gazing: Yostume had used the purple Pearl to gaze into the various dream-like memories of Moroha, Takechiyo and Towa in order to find out their flaws. This ability was completely ineffective against Setsuna, as her personal dreams and memories were take from her.

Weakness
All of their various abilities are proven to be completely ineffective whenever its half-demon holder temporarily loses her demon powers as their respective Pearl amplifies one's own demonic strength and techniques somewhat.

Warring States Era
Sometime in their early childhood, Towa and Setsuna each had a Rainbow Pearl - silver and golden, respectively - inserted one of their eyes. The red pearl was previously owned by Tōkotsu, and was confiscated by Moroha after she slew him.

When Towa and Setsuna were 4-years old, they were separated from each other in forest fire. While desperately searching for her younger sister, Towa's silver Rainbow Pearl opened a a time portal that forcefully sent her into present-day Japan, where she is found and raised by Sōta Higurashi, and his family.

Throughout the Series
For 10 years since the twins' separation, Towa lived in the present with the Higurashi family, and Setsuna lived in the past with the Demon slayers, respectively.

Back in the past, the Demon Slayers Hisui, Kohaku and Setsuna cornered Moroha because they mistook her for a demon that is attacking the locals. However, real culprit Mistress Three-Eyes appeared and stole the red and gold Rainbow Pearls in Moroha and Setsuna's possession.

Suddenly, a portal opens, dragging Setsuna, Moroha, and the Mistress Three-Eyes to the present before Towa, who recognizes her long-lost beloved twin sister. Sensing the silver Rainbow Pearl in Towa's possession, Mistress Three-Eyes attacks Towa. Much to Towa's surprise, her sword breaks when she tries to slash Mistress Three-Eyes, but Towa manages to use the Silver Pearl's great power to convert the broken hilt into a light blue blade of pure demonic energy and damage Mistress Three-Eyes. Setsuna finishes her off with her weapon, allowing her and Moroha recover theirs.

Riku utilizes his blue Pearl to create and control water from the stream for Towa's amusement. He later creates a bag of gold from it.

Appearances

 * The Three Princesses (first appearance; red and gold)
 * The Dream Butterfly (silver)
 * The Gateway to the Past
 * Jakotsumaru of the Red Bone Palace
 * Meeting Through an Apple (blue)
 * The Dream-Gazing Trap (green and purple)
 * Meifuku the Meiōjū
 * The Gold and Silver Rainbow Pearls
 * Curse of the Man-Eating Pond
 * Night of the New Moon and the Black-Haired Towa
 * The Delicious Feudal Monks (orange)
 * The Mastermind Who Burned the Forest

Trivia

 * They are quite well-known as "the fabled treasure" throughout the Fuedual Era.
 * When Towa and Setsuna's eye glows, their Pearl is in use and boosting their strength temporarily.
 * It's unknown how the pearls were created, but Sesshomaru came to be in possession of two of them before giving them to his daughters.
 * For some reason, despite the numerous times the Pearls have been removed, they automatically return to Towa and Setsuna's eyes. Possibly because the pearls adapted to their bodies due to having been with them since birth. This explains as to why the red Pearl does not go into Moroha's eye after she had taken it for herself.
 * As of "The Dream-Gazing Trap" only the orange Pearl has not been seen as its possessor.
 * The Rainbow Pearls share similarities with the Sacred Jewel:
 * They are orbicular
 * They can further develop and drastically enhance demonic power to higher levels
 * They are also pursued by both demons and humans to fulfill their own selfish wishes and desire for more strength.
 * The Gold and Silver pearls inside the left eye of Setsuna, and right eye of Towa, respectively, mirrors Inuyasha's right eye holding the Black Pearl that opened a portal to Border of the Afterlife that led to the tomb of Tōga.
 * They seem to be somewhat similar to to the seven mystical Rainbow Crystals of the first season of Sailor Moon.