Voice Range: Mid-High
Voice Example: https://www.youtube.com/watch?v=SecF7YRPKE8

Miyako is the eldest daughter of the Arima branch family, which took Shiki in as a child. Currently in the fifth grade, she sees herself as Shiki's other sister. She learned bajiquan by observing others in her family's dojo, though it now sits unused. Although she was nowhere near the skill of a true martial artist, her abilities quickly flourish in the ensuing battles. Her destructive powers make it hard to believe she is only 11 years old.

Her feelings are easy to see as she always wears her heart on her sleeve. She unabashedly adores her kind, quiet older "brother", but whenever he is near, she becomes so nervous she can barely speak. This continued for many years until Shiki was suddenly called back in the Tohno family, and Miyako did not take the news well.

Though she and Akiha are more of distant cousins in terms of familial relations with each other, Type Lumina has Neco-Arc refer to Akiha as "Miyako's stepsister" in her Boss Rush story, implying that Miyako sees Akiha as her "older sister" by virtue of Akiha being Shiki's actual younger sister. Of course, thanks to that, this also means that she sees Akiha as her biggest competitor when it comes to getting her "big brother's" affection.