Gou Koga

Gō Koga (古賀 剛, Koga Gō) is a large and muscular man who resembles a punkish biker with spiky orange hair. Even without using his doll, Koga has impressive physical strength, able to easily overpower Ichigo with just his bare hands. His doll is Dalk, a female metallic doll who can control her molecules and reshape herself at will. According to episode 83, Koga's real name is Claude Gauguin, and he lived in a European country in years past. He has lived for over 12 generations. After a falling out with Kariya over his plan to destroy Soul Society, which Koga found too extreme, Koga attempted to find and stop Kariya himself. He ended up fighting and losing to Tōshirō Hitsugaya instead, as neither he nor Dalk could contend with the extreme cold and long-range nature of Hitsugaya's Zanpakutō. He did not die, however, and was secretly taken by Yoruichi Shihōin to Rantao's home, where he was…