Shisui Tsuchimikado

Shisui Tsuchimikado (土御門 四翠, Tsuchimikado Shisui) is a former GRANBELM participant and Kuon's older sister, When she was defeated, Shisui was rendered comatose and remained so for much of the series.

Personality & Character
Shisui was an affectionate, doting sister to Kuon. She was determined to protect Kuon from the circumstances of the Tsuchimikado family and participated in the GRANBELM in order to acheive this. She possessed a keen strategic mind, devising a gambit to surpass its restrictions and combine her power with Kuon's.

When she awoke from her slumber, she demonstrated a cheerful, optimistic character, serenely asking a distraught Mangetsu if she too felt the world was but one miracle after another, imparting a simple appreciation for life.

Skills & Abilities
Shisui is a talented musician. She plays the piano, which she taught Kuon to play, the guitar, and sings very well.

Little is known about her abilities as a mage, but it can be inferred that her ARMANOX, utilised similar, or opposite gravity control magic to Kuon's SETSGETS BAIKA; she once told her that by combining Kuon's 'lightness' with her 'heaviness', they could 'control everything'.

History
Shisui fought in a GRANBELM in order to protect her younger sister, Kuon. During the tournament, she formed a romantic relationship with Hakamada Suishou, who was also participating. On the night of one full moon, she gave Kuon a short sword and directions to a hideout, should she not return. During the subsequent battle, she asked Suishou to 'eat' her. Obliging her, Suishou 'ate' part of Suishou's soul, leaving her comatose.

Believing her sister to have been cursed, Kuon joined the GRANBELM for the sake of lifting the spell. During the round, she encountered Suishou, pursuing her on numerous occasions. Finally, when Kuon was about to submit to Suishou, asking to be 'eaten', too, a stray note caused by the collision of her sword and strings made her realise that Shisui had always been by her side. Breaking free and overpowering DROSELA NOCTURNE, Kuon chased her whilst rejoicing at her sister's presence. Simultaneously, the piece of Shisui's soul inside of Suishou pulsed repeatedly, paining her immensely and interrupting her counterattack.

Finally, Kuon performed a spell Shisui had 'left behind' for her, critically damaging the revealed CELLAR DOOR. Agonisingly, Suishou tried to purge herself of Shisui. When she was drawn out of her ARMANOX, the fragment merged with Kuon's knife in their attempt to fatally wound Suishou. Tragically, Suishou could not be killed by normal means and turned the knife back upon Kuon. Dying, Kuon used the last of her strength to throw away the piece of Shisui's soul before she was destroyed in CELLAR DOOR's blast.

The following evening, the newly awakened Shisui met Mangetsu on the pier near the Tsuchimikado house. Playfully teasing her hair like Kuon's, she greeted her. Sensing familiarity, she asked if it was her first time there. She spoke serenely about the strangeness of life and the miraculous nature of the world. Mangetsu asked if she knew a girl named Kuon. Shisui responded that she didn't, but tearfully called it a wonderful name.

Later, Mangetsu invited her camping with the Rin sisters, Kibou, and Shingetsu. She sang a song by the campfire, which she wrote whilst wondering what it would be like to have a little sister. She witnessed Mangetsu bid them goodbye but tragically, her instability caused Shisui and the others to instantly forget her.

After Shingetsu became the Princeps Mage, she is seen for the final time smartly dressed, but evidently running late and telling herself she has to hurry. Shingetsu briefly gazes after her.

Relationships

 * Kuon Tsuchimikado
 * Suishou Hakamada
 * Mangetsu Kohinata