Liu Feihe is a female martial artist who mastered Kyokujuji Seiken, a Hokuto Ryū Ken variant. Rescued from forced labor by Liu Feiyan—who eliminated her captors and became her mentor—she dedicated herself to vengeance after Yasaka killed Feiyan in Shanghai. Mistakenly identifying Kasumi Kenshiro as Feiyan's murderer due to former Red Gang members' deception, she confronted him in combat, demonstrating the capability to injure him.

Her fighting style employs blindingly swift arm movements for stabbing and slicing, sharing conceptual ties to Nanto Seiken through their connection to the Southern Cross constellation. Liu Feihe wields devastating force ("Large Country Level" destructive capacity) and reacts at FTL speeds, enabling her to counter Kenshiro's assaults. Her durability matches this offensive tier, though lifting strength remains unquantified. She engages adversaries from melee range up to several meters.

No significant equipment, inherent weaknesses, or deviations from this vengeance-driven narrative exist in official records. Her story focuses solely on this quest for retribution and martial confrontation.