Yumiko Minamino (南野裕美子 Minamino Yumiko) is the leader of a tough girl gang.
Yumiko always skips classes and loiters around the streets with Rena Isayama, trying to find prey. They threaten girls from other schools and rob them for their money. The police have caught her many times and that’s why the guidance section of the local police knows her activities pretty well. Being wicked and cold hearted, she doesn't mind fighting using a rod or steel pipe, let alone using bad language.
- Yumiko's zodiac sign is Virgo and she has a O blood type.