Diamond Queen ダイヤモンド・クイーン

Joker and Spade's childhood rival and friend. Queen is a strong-willed young girl that won't let anyone get in her way to steal something, although she sometimes shows her sensibility. Although she is very attached and loyal to Silver Heart, she won't hesitate to tell him off when he does something unreasonable. Though beautiful and cute, she is very tough.

Queen is portrayed as physically powerful, relying on her brains and muscle more often than gadgets, unlike her rival phantom thieves. Queen is skilled with her diamond sword, which can cut through nearly anything.