Omigawa Kyouko

A nurse who works at the hospital that the Yagumo Group treats.

She is not intimidated even when dealing with the boss or members of the group, and is a reliable person who behaves as usual.

She lives in the neighborhood of the Yagumo Group, and has known the Rio sisters since they were little.

To the Rio sisters, she is like an older sister.
She also thinks of Rio and Miyu as little sisters, and dotes on them.

She is trusted by the boss and members of the Yagumo Group.
She gives various advice to Rio, who is aiming to become a nurse.