Mikoto has long black hair which she has tied in a ponytail with bluish-purple eyes. She wears a purple kimono with a sarashi underneath along with a dark red sash and thigh-length boots. She also wears a red shoulder guard on her nonweapon arm, arm guards, and keeps her katana in the sash at her waist.
Mikoto has a serious and honorable personality, unwilling to use cowardly tactics even in an emergency, as shown through her disapproval of Pass Parading the monsters that were chasing them onto the Hestia Familia. She also likes taking baths and even has her own ritual she goes through before entering hot springs.
Mikoto originally hails from the Far East. Her parents died several years after her birth. Tsukuyomi and Takemikazuchi took the young girl into their orphanage, where she lived for years, eventually joining the Takemikazuchi Familia.
Mikoto and the other members of the Takemikazuchi Familia used to sneak Sanjouno Haruhime out of her mansion at night to play with her. They were eventually caught, damaging relations between Haruhime's father and the shrine. They pursued their nightly fun regardless.
Two years before the story, Mikoto and the other Takemikazuchi Familia members moved to Orario to earn money to help support the shrine.
Concurrent Chanting (並行詠唱): A high-level technique involving casting magic while fighting or moving around. Its difficulty is likened to dealing with a bomb with both hands while fighting due to the chance of failing a chant or not being able to control their own magic power.
Futsunomitama (フツノミタマ): Futsunomitama is a type of gravity magic that crushes a given area. Upon use, a dark purple sword of light falls down on the opponent, and at the same time, multiple centric circles appear below them. As the sword touches the circles, it creates a huge dome-shaped force field with a radius of ten meters around them. This magic was temporarily able to stop the Black Goliath despite their difference in power.
Abnormal Resistance (耐異常): Abnormal Resistance negates the effect of abnormalities, such as poison.
- Mikoto is skilled at cooking, having cooked often with the other women of the orphanage using limited supplies, and is skilled enough to earn praise from Hestia who is an ardent lover of Jagamarukun.
- Mikoto's Yatanokurogarasu and Yatanoshirogarasu are a reference to the Yatanokarasu that was sent to guide Jinmu Tousei to Yamato.
- Mikoto's full name is a possible reference to Yamato Takeru no Mikoto.