Aya Kōda

 Aya Koda (幸田 文,) is a minor character who appears in Chapter 40. She is a civilian who assists Kunikida with a case.

Appearance
Aya is a young girl, likely between 12-15 years old. She has red hair that is worn in a bob with hair pins on both sides of her hair. She wears a tan duffel coat with two off-center fastenings. Underneath her coat she wears a yellow dress with violet tights and pink shoes.

Personality
Aya is a spirited girl who calls herself a warrior of justice and practices martial arts every day. She is stubborn, refusing to take no for an answer, and makes fun of Kunikida often. She seems to value helping others and is willing to sacrifice herself for the sake of others.

Plot
In Chapter 40, Aya receives a suitcase from a disguised Katsura Shousaku, without knowing that there is a bomb inside. Kunikida takes the suitcase from her, saving her and the others in the train station. Aya decides to help Kunikida find the culprit and goes to search with him. Katsura manages to strap a bomb to Aya, taking Kunikida by surprise. Having to choose between saving Aya or saving a train from being blown up, Kunikida apologizes to Aya. She accepts her fate, saying it is for the sake of everyone else, and the two of them are hit by the bomb. Yosano manages to heal the two of them, so both Aya and Kunikida are unharmed. After Katsura is captured by the police, Aya implies that she wouldn't mind being Kunikida's girlfriend. Kunikida tells her that she doesn't meet his requirements for a partner, turning her down gently.

Quotes

 * "I am a warrior of justice! For that, I have been practicing martial arts every day! If I simply hide in a corner in this situation, I would never forgive myself!"

Trivia

 * Aya speaks in Kansai dialect.
 * Prior to the anime OVA, Aya's family name was unknown. The anime revealed that she is also based on an author, Aya Koda.