Selene Eiselstein

Selene is depicted as a reserved young girl seen chiefly in flashback and in a single portrait alongside her father. She no longer exists in the present of the story, and the game preserves her memory through a grave at the church near Hiessgart rather than through any current presence.

She was a soft-spoken child, unusually bright and a genuine prodigy in alchemy who often assisted her father with his experiments. Her quietness left a mixed impression on those who met her only briefly. Recalling their first encounter, Edward assumed she was cold-hearted because she did not appear to see him and Alphonse off, though Major Armstrong suggested the girl may simply have found the farewell too hard to face.

While helping her father chase the legendary amplifier known as the Philosopher's Catalyst, Selene was caught in a rebound from one of his prototype attempts, and her body began to mutate. Wilhelm turned to the unfinished Catalyst in a bid to save her, but the change continued until she became the girl named Armony. Armony carries scattered memories of playing with Selene as a child yet has no idea that she herself is, in a sense, that same person, instead believing Selene was an elder sister who died. She regularly visits the church grave and leaves an Etherflower there, unaware that no body lies beneath it.

When Wilhelm finally confesses the truth to the Elric brothers, he admits how much Selene's persistent silence had worried him. His experiments, he explains, began as an effort to bring her back, but in time he accepted that recovery was impossible and came instead to love Armony as his true daughter.