Former guard of Consort Wei; sworn protector
Xi Xin is a former bodyguard of Consort Wei who swore absolute loyalty to Wu Yuanzhao after she saved her brother's life. A master of martial arts and unwavering in her oath, she transitions from a guard with divided loyalties to the most reliable fighter in your retinue. Her ISTJ nature means her loyalty, once given, is permanent.
Xi Xin's loyalty questline in Chapters 9-10 is the key moment. Help her find her brother's killer and she becomes a permanent, powerful ally. Her combat skills save you in multiple QTE sequences and her information network provides crucial intelligence.