Akiko Yosano/Relationships

Ranpo Edogawa
Akiko and Ranpo appear to be very close, Akiko often teasing him and Ranpo childishly replying. Yosano was the first hire to the agency, after its establishment. When she first came in, Fukuzawa and Mori were fighting over her.

Ranpo took her aside and used ultra deduction to find her missing butterfly adornment gifted to her three years prior, and told her she wouldn’t have to use her ability often as he was the star of the agency. Akiko was surprised by his words, suddenly showing emotion by smiling to him and agreeing to join the agency. She's also with Ranpo when they arrived at the location where Edgar Allan Poe invited Ranpo for another competition on solving his novel. They seem to know each-over well, correctly assuming the others moves (like when Yosano asks Atsushi to go shopping).

Ōgai Mori
Near the end of the Great War, Yosano serves as the assistant of Mori. In the Decay of Angels arc of the manga, Akiko shows a great fear and resentment to Mori. In the anime, Akiko once said "I have a bone to pick with Mori". Akiko served as a military hospital scholar alongside Mori when she was 11, Mori having recruited her from a cake shop to use her ability in the Great War. Akiko was emotionally abused by Mori during her time working with him as a doctor. After the Great War, Akiko was incarcerated and became apathetic. Three years later, Mori found her in incarceration and tried to get her to work if him again. Mori's then friend, Fukuzawa, was against this as he felt compassion for Akiko, knowing she isn't fond of him after her experience working and being abused by Mori during the Great War.

This disagreement caused Fukuzawa and Mori to fight in front of Akiko as she sat in a wheelchair, it wasn't said who won the fight. After this, Fukuzawa and Mori became enemies and Akiko felt it was her doing. Akiko once said in the manga it was her fault that the Armed Detective Agency and the Port Mafia are on bad terms. Currenlty, Akiko appears to be terrified and angry at Mori. When Akiko found out that a member of the agency would be transferred into the Port Mafia from a deal with Fukuzawa, Akiko immediately froze in fear before yelling at Mori angrily.