Shie Sugihara serves as editor for Kana Hagino, a Nadeshiko Academy student and bestselling romance novelist. She enforces strict deadlines, consistently pressuring Kana to complete manuscripts on schedule while demonstrating understanding and support for her creative process and personal circumstances. Professionally, Shie focuses on managing Kana's writing career and ensuring timely novel publications.

She shares a longstanding personal connection with Kiri Kikyō, a physical education teacher at Nadeshiko Academy, having been friends since their high school years. Shie actively advises Kiri on romantic matters, specifically guiding her through lingering feelings for Hiroki Kamikura and strategies to approach him despite their complex history.

Her background includes attending high school alongside Kiri, and her role centers exclusively on managing Kana's literary career and maintaining her supportive friendship with Kiri.