Xiao-Mei

Xiao-Mei is Mei Chan's pet panda and traveling companion. Abandoned as a cub due to her abnormally small size, Xiao-Mei was cared for by Mei as if she were family and, therefore, has a particularly strong bond with the little girl. The two are constantly together and, as a bit of comic relief, Xiao-Mei frequently mimics Mei's actions whether it be in expression, practicing alkahestry or performing martial arts, taking whatever pose her master takes and moving in synchronized union with her.

Though cute, Xiao-Mei is rather vicious and fiercely protective of Mei Chan, using her strong panda jaws to bite anyone unworthy who comes too close to her master's presence, including Yoki and Edward. She seems to begrudgingly accept Scar's existence, as she has not attacked him (perhaps picking up instinctively on his good nature as Mei does). During the "Capture a Homunculus" mission devised by the Elrics, Ling Yao and Colonel Roy Mustang, Mei Chan and Xiao-Mei come to rescue Scar from being captured, but Xiao-Mei is separated from the others when Mei and Scar make their escape. Alphonse Elric, mistaking the panda for a cat, picks Xiao-Mei up and attempts to care for her. Xiao-Mei tries to bite in order to establish herself as a predator, but Al's armor body is impervious to her teeth, leading the panda to respect and fear the younger Elric brother. She tags along with Alphonse, remaining on his shoulder as she did with Mei, during the battle against Gluttony and the journey into Father's lair.

Meanwhile, Mei (worried for her little friend's safety) solicits Scar's help in locating her. They discover that she has been "panda-napped" by Alphonse and follow the two into the underground hiding place of the Homunculi.

After Xiao-Mei and Mei are reunited in Father's lair and whisked to Dr. Knox's home for safety and medical treatment, the two set off to rejoin Scar and head north. Not knowing how else to spread the word that they are searching for Mei, Edward and Alphonse include Xiao-Mei as a clue to the little girl's identity, following the path of the noticeable "black-and-white cat". Because of Xiao-Mei's conspicuous presence, Mei is identified heading north by Lt. General Grumman, chased to the Briggs Mountains by the Elric Brothers and tracked down (by the Elrics' request) by the Briggs Mountain Patrol.